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Full vulnerability report · 2026
CVE-2026-31539High confidence

smb: smbdirect: introduce smbdirect_socket.recv_io.credits.available

Linux · Linux

7.5HighCVSS 3.1
Recommended action
Patch only the product branches with a verified fix

High technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 11 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:High, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 0.43% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Linux Linux 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: Within 30 daysRemediation target: Within 180 days

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.

Cross-source reconciliation

Remediation availability differs by product scope

Verified remediation exists for at least one product or source, but 11 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

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.

15 package states
Package result overrides the generic status

BlackTree has verified remediation for at least one product or source, but the relevant distribution still reports no fixed package for 11 affected package states shown here. Treat those rows as affected with no fix until that distribution publishes a fixed version.

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 · sourcelinuxNot affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Debian bookwormbookworm · sourcelinuxNot affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Debian forkyforky · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.6.18.12-1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian sidsid · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.6.18.12-1Debian Security Tracker ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-aws-6.14Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-azure-6.11Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-gcp-6.11Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-hwe-6.11Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-lowlatency-hwe-6.11Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-nvidia-6.11Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-oem-6.11Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-oracle-6.14Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-raspi-realtimeAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-realtimeAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-riscvAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 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-2026-31539 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitykernel: smb: smbdirect: introduce smbdirect_socket.recv_io.credits.available
22 known affected

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

  • kernel-rt as a component of Red Hat Enterprise Linux 9
  • kernel-rt-core as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-core as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-devel as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-devel-matched as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-kvm as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-modules as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-modules-core as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-modules-extra as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-modules-internal as a component of Red Hat Enterprise Linux 9
  • kernel-rt-debug-modules-partner as a component of Red Hat Enterprise Linux 9
Summary
A flaw was found in the Linux kernel's `smbdirect` module. A race condition in the receive credit management logic allows the system to grant credits that a peer has already consumed. This timing vulnerability, occurring during the processing of incoming data, could lead to resource exhaustion and potentially result in a denial of service (DoS) condition.
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 The system must be rebooted for this update to take effect. Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture. Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available.
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-2026-25432

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

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
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionPatch only the product branches with a verified fix

High technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 11 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
01

What, why and how

In the Linux kernel, the following vulnerability has been resolved: smb: smbdirect: introduce smbdirect_socket.recv_io.credits.available The logic off managing recv credits by counting posted recv_io and granted credits is racy. That's because the peer might already consumed a credit, but between receiving the incoming recv at the hardware and processing the completion in the 'recv_done' functions we likely have a window where we grant credits, which don't really exist. So we better have a decicated counter for the available credits, which will be incremented when we posted new recv buffers and drained when we grant the credits to the peer.

What

In the Linux kernel, the following vulnerability has been resolved: smb: smbdirect: introduce smbdirect_socket.recv_io.credits.available The logic off managing recv credits by counting posted recv_io and granted credits is racy. That's because the peer might already consumed a credit, but between receiving the incoming recv at the hardware and processing the completion in the 'recv_done' functions we likely have a window where we grant credits, which don't really exist. So we better have a decicated counter for the available credits, which will be incremented when we posted new recv buffers and drained when we grant the credits to the peer.

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

In the Linux kernel, the following vulnerability has been resolved: smb: smbdirect: introduce smbdirect_socket.recv_io.credits.available The logic off managing recv credits by counting posted recv_io and granted credits is racy. That's because the peer might already consumed a credit, but between receiving the incoming recv at the hardware and processing the completion in the 'recv_done' functions we likely have a window where we grant credits, which don't really exist. So we better have a decicated counter for the available credits, which will be incremented when we posted new recv buffers and drained when we grant the credits to the peer.

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

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
a network path → vulnerable operation → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration.
CWE not yet assigned
CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticated
A

Official authority intelligence

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

BSI · German · WID-SEC-2026-1279Linux Kernel: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um nicht näher spezifizierte Angriffe durchzuführen, welche zu einem Denial-of-Service-Zustand, einer Rechteausweitung, der Ausführung von Code oder einer Speicherbeschädigung führen könnten.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260429Security Bulletin 29 Apr 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 29 Apr 2026, published on 29 April 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1230Multiples vulnérabilités dans le noyau Linux de Red Hat

ata/RHSA-2026:71700 Référence CVE CVE-2023-53781 https://www.cve.org/CVERecord?id=CVE-2023-53781 Référence CVE CVE-2023-54120 https://www.cve.org/CVERecord?id=CVE-2023-54120 Référence CVE CVE-2023-54214 https://www.cve.org/CVERecord?id=CVE-2023-54214 Référence CVE CVE-2025-21826 https://www.cve.org/CVERecord?id=CVE-2025-21826 Référence CVE CVE-2025-39964 https://www.cve.org/CVERecord?id=CVE-2025-39964 Référence CVE CVE-2025-40323 https://www.cve.org/CVERecord?id=CVE-2025-40323 Référence CVE CVE-2025-71082 https://www.cve.org/CVERecord?id=CVE-2025-71082 Référence CVE CVE-2026-23007 https://www.cve.org/CVERecord?id=CVE-2026-23007 Référence CVE CVE-2026-31539 https://www.cve.org/CVERecord?id=CVE-2026-31539 Référence CVE CVE-2026-31566 https://www.cve.org/CVERecord?id=CVE-2026-31566 Référence CVE CVE-2026-31692 https://www.cve.org/CVERecord?id=CVE-2026-31692 Référence CVE CVE-2026-43334 https://www.cve.org/CVERecord?id=CVE-2026-43334 Référence CVE CVE-2026-43370 https://www.cve.org/CVERecord?id=CVE-2026-43370 Référence CVE CVE-2026-45894 https://www.cve.org/CVERecord?id=CVE-2026-45894 Référence CVE CVE-2026-45959 https://www.cve.org/CVERecord?id=CVE-2026-45959 Référence CVE CVE-2026-46043 https://www.cve.org/CVERecord?id=CVE-2026-46043 Référence CVE CVE-2026-46117 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1204Multiples vulnérabilités dans le noyau Linux de Red Hat

d?id=CVE-2024-58007 Référence CVE CVE-2025-40026 https://www.cve.org/CVERecord?id=CVE-2025-40026 Référence CVE CVE-2025-40149 https://www.cve.org/CVERecord?id=CVE-2025-40149 Référence CVE CVE-2025-68745 https://www.cve.org/CVERecord?id=CVE-2025-68745 Référence CVE CVE-2025-71127 https://www.cve.org/CVERecord?id=CVE-2025-71127 Référence CVE CVE-2026-23103 https://www.cve.org/CVERecord?id=CVE-2026-23103 Référence CVE CVE-2026-23172 https://www.cve.org/CVERecord?id=CVE-2026-23172 Référence CVE CVE-2026-23466 https://www.cve.org/CVERecord?id=CVE-2026-23466 Référence CVE CVE-2026-31479 https://www.cve.org/CVERecord?id=CVE-2026-31479 Référence CVE CVE-2026-31539 https://www.cve.org/CVERecord?id=CVE-2026-31539 Référence CVE CVE-2026-31566 https://www.cve.org/CVERecord?id=CVE-2026-31566 Référence CVE CVE-2026-31656 https://www.cve.org/CVERecord?id=CVE-2026-31656 Référence CVE CVE-2026-31663 https://www.cve.org/CVERecord?id=CVE-2026-31663 Référence CVE CVE-2026-43114 https://www.cve.org/CVERecord?id=CVE-2026-43114 Référence CVE CVE-2026-43133 https://www.cve.org/CVERecord?id=CVE-2026-43133 Référence CVE CVE-2026-43233 https://www.cve.org/CVERecord?id=CVE-2026-43233 Référence CVE CVE-2026-43248 https://www.cve.org/CVERecord?id=CVE-2026-43248 Référence CVE CVE-2026-43339 https://www.cve.org/CVERecord?id=

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-013230LinuxのLinux Kernelにおける不特定の脆弱性

Linuxカーネルにおいて、以下の脆弱性が修正されました：smb: smbdirectでは、smbdirect_socket.recv_io.credits.availableの導入により、recv_ioで付与されたクレジットをカウントしてrecvクレジットを管理するロジックに競合状態が存在していました。これは、ピアがすでにクレジットを消費している可能性があるにもかかわらず、ハードウェアで受信したrecvと「recv_done」関数での完了処理の間に、実際には存在しないクレジットを付与してしまうウィンドウがあるためです。したがって、利用可能なクレジットを専用に管理するカウンターを設け、新しいrecvバッファを投稿したときにインクリメントし、ピアにクレジットを付与したときにデクリメントされるように修正しました。

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.
Fix availability varies by product
Affected
Fixed
Action
Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 24 Apr 2026 · Last source change 5 Aug 2026, 12:23 UTC · CWE not yet assigned

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 2026-08-14
European sourceENISA EUVD · EUVD-2026-25432
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceUnavailable
NVD statusNVD enriched

Missing structured fields: CWE classification. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    bpftool as a component of Red Hat Enterprise Linux 9; kernel as a component of Red Hat Enterprise Linux 9; kernel-64k as a component of Red Hat Enterprise Linux 9; kernel-64k-core as a component of Red Hat Enterprise Linux 9; kernel-64k-debug as a component of Red Hat Enterprise Linux 9; kernel-64k-debug-core as a component of Red Hat Enterprise Linux 9; kernel-64k-debug-devel as a component of Red Hat Enterprise Linux 9; kernel-64k-debug-devel-matched as a component of Red Hat Enterprise Linux 9; kernel-64k-debug-modules as a component of Red Hat Enterprise Linux 9; kernel-64k-debug-modules-core as a component of Red Hat Enterprise Linux 9; kernel-64k-debug-modules-extra as a component of Red Hat Enterprise Linux 9; kernel-64k-debug-modules-internal as a component of Red Hat Enterprise Linux 9; kernel-64k-debug-modules-partner as a component of Red Hat Enterprise Linux 9; kernel-64k-devel as a component of Red Hat Enterprise Linux 9; kernel-64k-devel-matched as a component of Red Hat Enterprise Linux 9; kernel-64k-modules as a component of Red Hat Enterprise Linux 9; kernel-64k-modules-core as a component of Red Hat Enterprise Linux 9; kernel-64k-modules-extra as a component of Red Hat Enterprise Linux 9; kernel-64k-modules-internal as a component of Red Hat Enterprise Linux 9; kernel-64k-modules-partner as a component of Red Hat Enterprise Linux 9; kernel-abi-stablelists as a component of Red Hat Enterprise Linux 9; kernel-core as a component of Red Hat Enterprise Linux 9; kernel-cross-headers as a component of Red Hat Enterprise Linux 9; kernel-debug as a component of Red Hat Enterprise Linux 9; kernel-debug-core as a component of Red Hat Enterprise Linux 9; kernel-debug-devel as a component of Red Hat Enterprise Linux 9; kernel-debug-devel-matched as a component of Red Hat Enterprise Linux 9; kernel-debug-modules as a component of Red Hat Enterprise Linux 9; kernel-debug-modules-core as a component of Red Hat Enterprise Linux 9; kernel-debug-modules-extra as a component of Red Hat Enterprise Linux 9; and 78 more · Fixed: kernel-64k-debug-debuginfo-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-64k-debug-devel-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-64k-debug-devel-matched-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-64k-debuginfo-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-64k-devel-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-64k-devel-matched-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-debuginfo-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-debuginfo-0:6.12.0-211.55.1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-debuginfo-0:6.12.0-211.55.1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-debuginfo-0:6.12.0-211.55.1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-devel-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-devel-0:6.12.0-211.55.1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-devel-0:6.12.0-211.55.1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-devel-0:6.12.0-211.55.1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-devel-matched-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-devel-matched-0:6.12.0-211.55.1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-devel-matched-0:6.12.0-211.55.1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-devel-matched-0:6.12.0-211.55.1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debuginfo-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debuginfo-0:6.12.0-211.55.1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debuginfo-0:6.12.0-211.55.1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debuginfo-0:6.12.0-211.55.1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debuginfo-common-aarch64-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debuginfo-common-ppc64le-0:6.12.0-211.55.1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debuginfo-common-s390x-0:6.12.0-211.55.1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debuginfo-common-x86_64-0:6.12.0-211.55.1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-devel-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-devel-0:6.12.0-211.55.1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-devel-0:6.12.0-211.55.1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-devel-0:6.12.0-211.55.1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); and 279 more
    After
    kernel-rt as a component of Red Hat Enterprise Linux 9; kernel-rt-core as a component of Red Hat Enterprise Linux 9; kernel-rt-debug as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-core as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-devel as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-devel-matched as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-kvm as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules-core as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules-extra as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules-internal as a component of Red Hat Enterprise Linux 9; kernel-rt-debug-modules-partner as a component of Red Hat Enterprise Linux 9; kernel-rt-devel as a component of Red Hat Enterprise Linux 9; kernel-rt-devel-matched as a component of Red Hat Enterprise Linux 9; kernel-rt-kvm as a component of Red Hat Enterprise Linux 9; kernel-rt-modules as a component of Red Hat Enterprise Linux 9; kernel-rt-modules-core as a component of Red Hat Enterprise Linux 9; kernel-rt-modules-extra as a component of Red Hat Enterprise Linux 9; kernel-rt-modules-internal as a component of Red Hat Enterprise Linux 9; kernel-rt-modules-partner as a component of Red Hat Enterprise Linux 9; kernel-rt-selftests-internal as a component of Red Hat Enterprise Linux 9; kernel-rt.src as a component of Red Hat Enterprise Linux 9 · Fixed: kernel-64k-debug-debuginfo-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-64k-debug-devel-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-64k-debug-devel-matched-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-64k-debuginfo-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-64k-devel-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-64k-devel-matched-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-debuginfo-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-debuginfo-0:6.12.0-211.55.1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-debuginfo-0:6.12.0-211.55.1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-debuginfo-0:6.12.0-211.55.1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-devel-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-devel-0:6.12.0-211.55.1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-devel-0:6.12.0-211.55.1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-devel-0:6.12.0-211.55.1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-devel-matched-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-devel-matched-0:6.12.0-211.55.1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-devel-matched-0:6.12.0-211.55.1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debug-devel-matched-0:6.12.0-211.55.1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debuginfo-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debuginfo-0:6.12.0-211.55.1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debuginfo-0:6.12.0-211.55.1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debuginfo-0:6.12.0-211.55.1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debuginfo-common-aarch64-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debuginfo-common-ppc64le-0:6.12.0-211.55.1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debuginfo-common-s390x-0:6.12.0-211.55.1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-debuginfo-common-x86_64-0:6.12.0-211.55.1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-devel-0:6.12.0-211.55.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-devel-0:6.12.0-211.55.1.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-devel-0:6.12.0-211.55.1.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); kernel-devel-0:6.12.0-211.55.1.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); and 582 more
    Red Hat Product Security ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2026-25432↗Vendor CSAF · Red Hat Product Security↗CVE authority or vendor reference↗Patch or update reference↗Patch or update reference↗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-2026-31539 · cve.blacktree.nl