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Full vulnerability report · 2026
CVE-2026-63381High confidence

Libevent: Dangling Pointer in `evbuffer_add_buffer_reference`

libevent · libevent

Official source article: GitHub GHSA-C2PJ-CG4R-88C8 ↗. Check the applicable product and release in the original source.

5.8MediumCVSS 4.0
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Low, lowered one band.downgradedsince 21 Aug 2026

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • Exploitation requires an existing local or physical foothold with privileges.
  • EPSS is 0.16% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict local access and enforce least privilege on affected hosts.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs libevent libevent and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: No default targetRemediation target: Normal maintenance

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Distribution package intelligence

Release-specific package status

Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

5 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcelibeventVendor fix publishedDebian records a fixed source-package version for this release.2.1.13-stable-1~deb13u1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian bookwormbookworm · sourcelibeventVendor fix publishedDebian records a fixed source-package version for this release.2.1.12-stable-8+deb12u1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian forkyforky · sourcelibeventVendor fix publishedDebian records a fixed source-package version for this release.2.1.13-stable-1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian sidsid · sourcelibeventVendor fix publishedDebian records a fixed source-package version for this release.2.1.13-stable-1Debian Security Tracker ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelibeventVendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.2.1.12-stable-9ubuntu2.1Canonical Ubuntu Security ↗Source updated 6 Oct 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2026-63381 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitylibevent: Libevent: Memory corruption due to use-after-free
16 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • libevent-devel as a component of Red Hat Enterprise Linux 6
  • libevent-doc as a component of Red Hat Enterprise Linux 6
  • libevent-headers as a component of Red Hat Enterprise Linux 6
  • libevent.src as a component of Red Hat Enterprise Linux 6
  • libevent2-devel as a component of Red Hat Enterprise Linux 6
  • libevent2-doc as a component of Red Hat Enterprise Linux 6
  • libevent2.src as a component of Red Hat Enterprise Linux 6
  • libevent-devel as a component of Red Hat Enterprise Linux 7
  • libevent-doc as a component of Red Hat Enterprise Linux 7
  • libevent.src as a component of Red Hat Enterprise Linux 7
  • libevent as a component of Red Hat Enterprise Linux 8
  • libevent-devel as a component of Red Hat Enterprise Linux 8
Summary
A flaw was found in Libevent, an event notification library. A use-after-free vulnerability exists in the `evbuffer_add_buffer_reference` function when it processes an output buffer with a zero length. This can lead to a dangling pointer, which an attacker could exploit to cause memory corruption or crash the application.
Remediation
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-63504

No EUVD known-exploited evidence

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has a use-after-free in buffer.c when evbuffer_add_buffer_reference processes an output buffer whose out_total_len is zero. evbuffer_free_all_chains frees the initial empty chain without resetting outbuf->first, outbuf->last, or outbuf->last_with_datap, and APPEND_CHAIN_MULTICAST subsequently dereferences the dangling chain pointer. A caller that can drive this buffer state can cause memory corruption or a process crash. This issue is fixed in versions 2.1.13 and 2.2.2-alpha.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
5.8 · CVSS 4.0
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has a use-after-free in buffer.c when evbuffer_add_buffer_reference processes an output buffer whose out_total_len is zero. evbuffer_free_all_chains frees the initial empty chain without resetting outbuf->first, outbuf->last, or outbuf->last_with_datap, and APPEND_CHAIN_MULTICAST subsequently dereferences the dangling chain pointer. A caller that can drive this buffer state can cause memory corruption or a process crash. This issue is fixed in versions 2.1.13 and 2.2.2-alpha.

What

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has a use-after-free in buffer.c when evbuffer_add_buffer_reference processes an output buffer whose out_total_len is zero. evbuffer_free_all_chains frees the initial empty chain without resetting outbuf->first, outbuf->last, or outbuf->last_with_datap, and APPEND_CHAIN_MULTICAST subsequently dereferences the dangling chain pointer. A caller that can drive this buffer state can cause memory corruption or a process crash. This issue is fixed in versions 2.1.13 and 2.2.2-alpha.

Why

The product uses or accesses a resource that has not been initialized.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.

What

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has a use-after-free in buffer.c when evbuffer_add_buffer_reference processes an output buffer whose out_total_len is zero. evbuffer_free_all_chains frees the initial empty chain without resetting outbuf->first, outbuf->last, or outbuf->last_with_datap, and APPEND_CHAIN_MULTICAST subsequently dereferences the dangling chain pointer. A caller that can drive this buffer state can cause memory corruption or a process crash. This issue is fixed in versions 2.1.13 and 2.2.2-alpha.

Why

The product uses or accesses a resource that has not been initialized.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Use of Uninitialized Resource → disrupt the affected service
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Not a CVSS 4.0 base metric
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-908 ↗

CWE-908: Use of Uninitialized Resource. The product uses or accesses a resource that has not been initialized.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

Common Vulnerability Scoring System 4.0: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.ATPresentAttack requirements: A particular deployment or execution condition must be present.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.VCLowVulnerable-system confidentiality: A successful attack can cause a limited loss.VILowVulnerable-system integrity: A successful attack can cause a limited loss.VAHighVulnerable-system availability: A successful attack can cause a major loss.SCNoneSubsequent-system confidentiality: No direct loss is represented by this metric.SINoneSubsequent-system integrity: No direct loss is represented by this metric.SANoneSubsequent-system availability: No direct loss is represented by this metric.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
Denial of serviceCWE-908
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-63504Official EUVD mapping

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has a use-after-free in buffer.c when evbuffer_add_buffer_reference processes an output buffer whose out_total_len is zero. evbuffer_free_all_chains frees the initial empty chain without resetting outbuf->first, outbuf->last, or outbuf->last_with_datap, and APPEND_CHAIN_MULTICAST subsequently dereferences the dangling chain pointer. A caller that can drive this buffer state can cause memory corruption or a process crash. This issue is fixed in versions 2.1.13 and 2.2.2-alpha.

Official EUVD record ↗
BSI · German · WID-SEC-2026-3419Red Hat Enterprise Linux (corosync, libevent, libsoup): Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren oder offenzulegen oder Denial-of-Service-Zustände herbeizuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260826Security Bulletin 26 Aug 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 26 Aug 2026, published on 26 August 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1249Multiples vulnérabilités dans les produits VMware

ord?id=CVE-2026-59903 Référence CVE CVE-2026-6238 https://www.cve.org/CVERecord?id=CVE-2026-6238 Référence CVE CVE-2026-63072 https://www.cve.org/CVERecord?id=CVE-2026-63072 Référence CVE CVE-2026-63073 https://www.cve.org/CVERecord?id=CVE-2026-63073 Référence CVE CVE-2026-63074 https://www.cve.org/CVERecord?id=CVE-2026-63074 Référence CVE CVE-2026-63075 https://www.cve.org/CVERecord?id=CVE-2026-63075 Référence CVE CVE-2026-63076 https://www.cve.org/CVERecord?id=CVE-2026-63076 Référence CVE CVE-2026-63374 https://www.cve.org/CVERecord?id=CVE-2026-63374 Référence CVE CVE-2026-63379 https://www.cve.org/CVERecord?id=CVE-2026-63379 Référence CVE CVE-2026-63381 https://www.cve.org/CVERecord?id=CVE-2026-63381 Référence CVE CVE-2026-63382 https://www.cve.org/CVERecord?id=CVE-2026-63382 Référence CVE CVE-2026-63383 https://www.cve.org/CVERecord?id=CVE-2026-63383 Référence CVE CVE-2026-63384 https://www.cve.org/CVERecord?id=CVE-2026-63384 Référence CVE CVE-2026-63385 https://www.cve.org/CVERecord?id=CVE-2026-63385 Référence CVE CVE-2026-63387 https://www.cve.org/CVERecord?id=CVE-2026-63387 Référence CVE CVE-2026-63388 https://www.cve.org/CVERecord?id=CVE-2026-63388 Référence CVE CVE-2026-6357 https://www.cve.org/CVERecord?id=CVE-2026-6357 Référence CVE CVE-2026-6368 https://www.cve.org/CVERecord?id=CVE

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1233Multiples vulnérabilités dans les produits IBM

ERecord?id=CVE-2026-60147 Référence CVE CVE-2026-60589 https://www.cve.org/CVERecord?id=CVE-2026-60589 Référence CVE CVE-2026-61308 https://www.cve.org/CVERecord?id=CVE-2026-61308 Référence CVE CVE-2026-61487 https://www.cve.org/CVERecord?id=CVE-2026-61487 Référence CVE CVE-2026-6253 https://www.cve.org/CVERecord?id=CVE-2026-6253 Référence CVE CVE-2026-6276 https://www.cve.org/CVERecord?id=CVE-2026-6276 Référence CVE CVE-2026-6322 https://www.cve.org/CVERecord?id=CVE-2026-6322 Référence CVE CVE-2026-63379 https://www.cve.org/CVERecord?id=CVE-2026-63379 Référence CVE CVE-2026-63380 https://www.cve.org/CVERecord?id=CVE-2026-63380 Référence CVE CVE-2026-63381 https://www.cve.org/CVERecord?id=CVE-2026-63381 Référence CVE CVE-2026-63382 https://www.cve.org/CVERecord?id=CVE-2026-63382 Référence CVE CVE-2026-63383 https://www.cve.org/CVERecord?id=CVE-2026-63383 Référence CVE CVE-2026-63384 https://www.cve.org/CVERecord?id=CVE-2026-63384 Référence CVE CVE-2026-63385 https://www.cve.org/CVERecord?id=CVE-2026-63385 Référence CVE CVE-2026-63387 https://www.cve.org/CVERecord?id=CVE-2026-63387 Référence CVE CVE-2026-63388 https://www.cve.org/CVERecord?id=CVE-2026-63388 Référence CVE CVE-2026-63495 https://www.cve.org/CVERecord?id=CVE-2026-63495 Référence CVE CVE-2026-6402 https://www.cve.org/CVERecord?id=C

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
Action
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 20 Aug 2026 · Last source change 21 Aug 2026, 21:46 UTC · CWE-908 · Use of Uninitialized Resource

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-23
European sourceENISA EUVD · EUVD-2026-63504
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD awaiting enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    libevent-devel as a component of Red Hat Enterprise Linux 6; libevent-doc as a component of Red Hat Enterprise Linux 6; libevent-headers as a component of Red Hat Enterprise Linux 6; libevent.src as a component of Red Hat Enterprise Linux 6; libevent2-devel as a component of Red Hat Enterprise Linux 6; libevent2-doc as a component of Red Hat Enterprise Linux 6; libevent2.src as a component of Red Hat Enterprise Linux 6; libevent-devel as a component of Red Hat Enterprise Linux 7; libevent-doc as a component of Red Hat Enterprise Linux 7; libevent.src as a component of Red Hat Enterprise Linux 7; libevent as a component of Red Hat Enterprise Linux 8; libevent-devel as a component of Red Hat Enterprise Linux 8; libevent-doc as a component of Red Hat Enterprise Linux 8; libevent.src as a component of Red Hat Enterprise Linux 8; openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4 · Fixed: libevent-debuginfo-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-doc-0:2.1.13-1.el10_2.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-doc-0:2.1.13-1.el9_8.noarch as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); and 37 more
    After
    libevent-devel as a component of Red Hat Enterprise Linux 6; libevent-doc as a component of Red Hat Enterprise Linux 6; libevent-headers as a component of Red Hat Enterprise Linux 6; libevent.src as a component of Red Hat Enterprise Linux 6; libevent2-devel as a component of Red Hat Enterprise Linux 6; libevent2-doc as a component of Red Hat Enterprise Linux 6; libevent2.src as a component of Red Hat Enterprise Linux 6; libevent-devel as a component of Red Hat Enterprise Linux 7; libevent-doc as a component of Red Hat Enterprise Linux 7; libevent.src as a component of Red Hat Enterprise Linux 7; libevent as a component of Red Hat Enterprise Linux 8; libevent-devel as a component of Red Hat Enterprise Linux 8; libevent-doc as a component of Red Hat Enterprise Linux 8; libevent.src as a component of Red Hat Enterprise Linux 8; openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4 · Fixed: libevent-debuginfo-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-doc-0:2.1.13-1.el10_2.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-doc-0:2.1.13-1.el9_8.noarch as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); and 65 more
    Red Hat Product Security ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    libevent-devel as a component of Red Hat Enterprise Linux 6; libevent-doc as a component of Red Hat Enterprise Linux 6; libevent-headers as a component of Red Hat Enterprise Linux 6; libevent.src as a component of Red Hat Enterprise Linux 6; libevent2-devel as a component of Red Hat Enterprise Linux 6; libevent2-doc as a component of Red Hat Enterprise Linux 6; libevent2.src as a component of Red Hat Enterprise Linux 6; libevent-devel as a component of Red Hat Enterprise Linux 7; libevent-doc as a component of Red Hat Enterprise Linux 7; libevent.src as a component of Red Hat Enterprise Linux 7; libevent as a component of Red Hat Enterprise Linux 8; libevent-devel as a component of Red Hat Enterprise Linux 8; libevent-doc as a component of Red Hat Enterprise Linux 8; libevent.src as a component of Red Hat Enterprise Linux 8; openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4 · Fixed: libevent-debuginfo-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-doc-0:2.1.13-1.el10_2.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-doc-0:2.1.13-1.el9_8.noarch as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); and 32 more
    After
    libevent-devel as a component of Red Hat Enterprise Linux 6; libevent-doc as a component of Red Hat Enterprise Linux 6; libevent-headers as a component of Red Hat Enterprise Linux 6; libevent.src as a component of Red Hat Enterprise Linux 6; libevent2-devel as a component of Red Hat Enterprise Linux 6; libevent2-doc as a component of Red Hat Enterprise Linux 6; libevent2.src as a component of Red Hat Enterprise Linux 6; libevent-devel as a component of Red Hat Enterprise Linux 7; libevent-doc as a component of Red Hat Enterprise Linux 7; libevent.src as a component of Red Hat Enterprise Linux 7; libevent as a component of Red Hat Enterprise Linux 8; libevent-devel as a component of Red Hat Enterprise Linux 8; libevent-doc as a component of Red Hat Enterprise Linux 8; libevent.src as a component of Red Hat Enterprise Linux 8; openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4 · Fixed: libevent-debuginfo-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-doc-0:2.1.13-1.el10_2.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-doc-0:2.1.13-1.el9_8.noarch as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); and 37 more
    Red Hat Product Security ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    >= 2.2.0-alpha, < 2.2.2-alpha; < 2.1.13 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    >= 2.2.0-alpha, < 2.2.2-alpha; < 2.1.13 · Fixed: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
    Red Hat Product Security ↗
  4. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    Red Hat Product Security ↗
  5. Vendor guidanceAuthoritative vendor guidance changed from remediation: access.redhat.com/CVE-2026-63381 to remediation: access.redhat.com/CVE-2026-63381.
    Before
    remediation: access.redhat.com/CVE-2026-63381
    After
    remediation: access.redhat.com/CVE-2026-63381
    Red Hat Product Security ↗
  6. Affected versionsThe structured affected or fixed version information changed.
    Before
    libevent-devel as a component of Red Hat Enterprise Linux 10; libevent-doc as a component of Red Hat Enterprise Linux 10; libevent.src as a component of Red Hat Enterprise Linux 10; libevent-devel as a component of Red Hat Enterprise Linux 6; libevent-doc as a component of Red Hat Enterprise Linux 6; libevent-headers as a component of Red Hat Enterprise Linux 6; libevent.src as a component of Red Hat Enterprise Linux 6; libevent2-devel as a component of Red Hat Enterprise Linux 6; libevent2-doc as a component of Red Hat Enterprise Linux 6; libevent2.src as a component of Red Hat Enterprise Linux 6; libevent-devel as a component of Red Hat Enterprise Linux 7; libevent-doc as a component of Red Hat Enterprise Linux 7; libevent.src as a component of Red Hat Enterprise Linux 7; libevent-devel as a component of Red Hat Enterprise Linux 8; libevent-doc as a component of Red Hat Enterprise Linux 8; libevent.src as a component of Red Hat Enterprise Linux 8; libevent-devel as a component of Red Hat Enterprise Linux 9; libevent-doc as a component of Red Hat Enterprise Linux 9; libevent.src as a component of Red Hat Enterprise Linux 9; openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4 · Fixed: libevent-main@aarch64 as a component of Red Hat Hardened Images; libevent-main@noarch as a component of Red Hat Hardened Images; libevent-main@src as a component of Red Hat Hardened Images; libevent-main@x86_64 as a component of Red Hat Hardened Images
    After
    libevent-devel as a component of Red Hat Enterprise Linux 6; libevent-doc as a component of Red Hat Enterprise Linux 6; libevent-headers as a component of Red Hat Enterprise Linux 6; libevent.src as a component of Red Hat Enterprise Linux 6; libevent2-devel as a component of Red Hat Enterprise Linux 6; libevent2-doc as a component of Red Hat Enterprise Linux 6; libevent2.src as a component of Red Hat Enterprise Linux 6; libevent-devel as a component of Red Hat Enterprise Linux 7; libevent-doc as a component of Red Hat Enterprise Linux 7; libevent.src as a component of Red Hat Enterprise Linux 7; libevent as a component of Red Hat Enterprise Linux 8; libevent-devel as a component of Red Hat Enterprise Linux 8; libevent-doc as a component of Red Hat Enterprise Linux 8; libevent.src as a component of Red Hat Enterprise Linux 8; openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4 · Fixed: libevent-debuginfo-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debugsource-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-devel-0:2.1.13-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-doc-0:2.1.13-1.el10_2.noarch as a component of Red Hat Enterprise Linux AppStream (v. 10); libevent-debuginfo-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debuginfo-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-debugsource-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-devel-0:2.1.13-1.el9_8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-doc-0:2.1.13-1.el9_8.noarch as a component of Red Hat Enterprise Linux AppStream (v. 9); libevent-0:2.1.13-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); and 32 more
    Red Hat Product Security ↗
  7. Vendor guidanceAuthoritative vendor guidance changed from remediation: access.redhat.com/CVE-2026-63381 to remediation: access.redhat.com/CVE-2026-63381.
    Before
    remediation: access.redhat.com/CVE-2026-63381
    After
    remediation: access.redhat.com/CVE-2026-63381
    Red Hat Product Security ↗
  8. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    Red Hat Product Security ↗
  9. Affected versionsThe structured affected or fixed version information changed.
    Before
    libevent-devel as a component of Red Hat Enterprise Linux 10; libevent-doc as a component of Red Hat Enterprise Linux 10; libevent.src as a component of Red Hat Enterprise Linux 10; libevent-devel as a component of Red Hat Enterprise Linux 6; libevent-doc as a component of Red Hat Enterprise Linux 6; libevent-headers as a component of Red Hat Enterprise Linux 6; libevent.src as a component of Red Hat Enterprise Linux 6; libevent2-devel as a component of Red Hat Enterprise Linux 6; libevent2-doc as a component of Red Hat Enterprise Linux 6; libevent2.src as a component of Red Hat Enterprise Linux 6; libevent-devel as a component of Red Hat Enterprise Linux 7; libevent-doc as a component of Red Hat Enterprise Linux 7; libevent.src as a component of Red Hat Enterprise Linux 7; libevent-devel as a component of Red Hat Enterprise Linux 8; libevent-doc as a component of Red Hat Enterprise Linux 8; libevent.src as a component of Red Hat Enterprise Linux 8; libevent-devel as a component of Red Hat Enterprise Linux 9; libevent-doc as a component of Red Hat Enterprise Linux 9; libevent.src as a component of Red Hat Enterprise Linux 9; libevent.src as a component of Red Hat Hardened Images; openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4
    After
    libevent-devel as a component of Red Hat Enterprise Linux 10; libevent-doc as a component of Red Hat Enterprise Linux 10; libevent.src as a component of Red Hat Enterprise Linux 10; libevent-devel as a component of Red Hat Enterprise Linux 6; libevent-doc as a component of Red Hat Enterprise Linux 6; libevent-headers as a component of Red Hat Enterprise Linux 6; libevent.src as a component of Red Hat Enterprise Linux 6; libevent2-devel as a component of Red Hat Enterprise Linux 6; libevent2-doc as a component of Red Hat Enterprise Linux 6; libevent2.src as a component of Red Hat Enterprise Linux 6; libevent-devel as a component of Red Hat Enterprise Linux 7; libevent-doc as a component of Red Hat Enterprise Linux 7; libevent.src as a component of Red Hat Enterprise Linux 7; libevent-devel as a component of Red Hat Enterprise Linux 8; libevent-doc as a component of Red Hat Enterprise Linux 8; libevent.src as a component of Red Hat Enterprise Linux 8; libevent-devel as a component of Red Hat Enterprise Linux 9; libevent-doc as a component of Red Hat Enterprise Linux 9; libevent.src as a component of Red Hat Enterprise Linux 9; openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4 · Fixed: libevent-main@aarch64 as a component of Red Hat Hardened Images; libevent-main@noarch as a component of Red Hat Hardened Images; libevent-main@src as a component of Red Hat Hardened Images; libevent-main@x86_64 as a component of Red Hat Hardened Images
    Red Hat Product Security ↗
  10. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release recorded from official guidance
Fixed release recorded from official guidance
Fixed release recorded from official guidance
ENISA EUVD · EUVD-2026-63504↗Red Hat Product Security security advisory↗CVE authority or vendor reference · GitHub GHSA-C2PJ-CG4R-88C8↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-63381 · cve.blacktree.nl