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Full vulnerability report · 2026
CVE-2026-71226High confidence

Libkcapi: memory corruption via uncanceled aio requests on error in libkcapi's one-shot aio path

Stephan Muelle · libkcapi

Official source article: Red Hat RHSA-2026:56985 ↗. Check the applicable product and release in the original source.

7.3HighCVSS 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 2 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.
  • EPSS is 0.18% 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 Stephan Muelle libkcapi 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 2 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

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

8 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 2 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
Alpine v3.23v3.23 · mainlibkcapiVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.1.5.1-r0Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.22v3.22 · mainlibkcapiVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.1.5.1-r0Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.21v3.21 · mainlibkcapiVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.1.5.1-r0Alpine Security Database ↗Source updated 3 Oct 2026
Debian trixietrixie · sourcelibkcapiAffected, no fix publishedDebian currently tracks this release as open.Not published in this feedDebian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourcelibkcapiAffected, no fix publishedDebian currently tracks this release as open.Not published in this feedDebian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourcelibkcapiVendor fix publishedDebian records a fixed source-package version for this release.1.5.1-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcelibkcapiVendor fix publishedDebian records a fixed source-package version for this release.1.5.1-1Debian Security Tracker ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelibkcapiUnder evaluationCanonical reports that the package might be affected and still needs evaluation or fixing.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-2026-71226 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitylibkcapi: Memory corruption via uncanceled AIO requests on error in libkcapi's one-shot AIO path
2 known affected

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

  • 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
Summary
Memory Corruption via Uncanceled AIO Requests on Error: libkcapi's one-shot AIO path can return an error before all submitted IOCBs are drained, allowing later kernel writes into caller-owned output buffers.
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-2026-53375

No EUVD known-exploited evidence

Memory Corruption via Uncanceled AIO Requests on Error: libkcapi's one-shot AIO path can return an error before all submitted IOCBs are drained, allowing later kernel writes into caller-owned output buffers.

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
7.3 · CVSS 3.1
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 2 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

Memory Corruption via Uncanceled AIO Requests on Error: libkcapi's one-shot AIO path can return an error before all submitted IOCBs are drained, allowing later kernel writes into caller-owned output buffers.

What

Memory Corruption via Uncanceled AIO Requests on Error: libkcapi's one-shot AIO path can return an error before all submitted IOCBs are drained, allowing later kernel writes into caller-owned output buffers.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through local access 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

Memory Corruption via Uncanceled AIO Requests on Error: libkcapi's one-shot AIO path can return an error before all submitted IOCBs are drained, allowing later kernel writes into caller-owned output buffers.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through local access 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
local access → Use After Free → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
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: a standard category for the underlying weakness.
CWE-416 ↗

CWE-416: Use After Free. The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Common Vulnerability Scoring System 3.1: 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.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.CLowConfidentiality impact: A successful attack can cause a limited loss.ILowIntegrity impact: A successful attack can cause a limited loss.AHighAvailability impact: A successful attack can cause a major loss.
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.
UnauthenticatedCWE-416
A

Official authority intelligence

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

ENISA EUVD · EUVD-2026-53375Official EUVD mapping

Memory Corruption via Uncanceled AIO Requests on Error: libkcapi's one-shot AIO path can return an error before all submitted IOCBs are drained, allowing later kernel writes into caller-owned output buffers.

Official EUVD record ↗
BSI · German · WID-SEC-2026-3322Red Hat Enterprise Linux (libkcapi): Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um Informationen offenzulegen, Daten zu manipulieren, Speicherbeschädigungen zu verursachen oder einen Denial-of-Service-Zustand auszulösen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260812Security Bulletin 12 Aug 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 12 Aug 2026, published on 12 August 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-027968レッドハット等の複数ベンダの製品における解放済みメモリの使用に関する脆弱性

エラー時にキャンセルされなかったAIOリクエストがメモリ破損を引き起こす可能性があります。libkcapiのワンショットAIOパスは、送信されたすべてのIOCBが処理される前にエラーを返すことがあり、その結果、後続のカーネル書き込みが呼び出し元の所有する出力バッファに対して行われてしまいます。

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. Limit untrusted access and use least privilege until authoritative guidance is available.
Official vendor articles1 stored document

Linked articles are downloaded and versioned as source evidence. A CVE mention or approved update relationship does not, by itself, verify a fix for every product branch.

  • CVE-2026-71226 - Red Hat Customer Portal →Original publisher ↗Searchable text snapshot · Captured 29 Sep 2026CVE-2026-71226 Description Memory Corruption via Uncanceled AIO Requests on Error: libkcapi's one-shot AIO path can return an error before all submitted IOCBs are drained, allowing later kernel writes into caller-owned output buffers. Statement This Moderate impact flaw in libkcapi affects applications utilizing the on
04

Evidence and provenance

Published 5 Aug 2026 · Last source change 21 Sept 2026, 12:13 UTC · CWE-416 · Use After Free

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-2026-53375
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD modified after 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
    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: libkcapi-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-0:1.5.1-1.el10_2.src as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debuginfo-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debuginfo-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debuginfo-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debuginfo-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debugsource-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debugsource-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debugsource-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debugsource-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-debuginfo-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-debuginfo-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-debuginfo-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-debuginfo-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hmaccalc-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hmaccalc-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hmaccalc-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hmaccalc-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-tests-debuginfo-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-tests-debuginfo-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-tests-debuginfo-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-tests-debuginfo-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-tools-debuginfo-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); and 81 more
    After
    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: libkcapi-0:1.5.0-6.el10_0.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0); libkcapi-0:1.5.0-6.el10_0.ppc64le as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0); libkcapi-0:1.5.0-6.el10_0.s390x as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0); libkcapi-0:1.5.0-6.el10_0.src as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0); libkcapi-0:1.5.0-6.el10_0.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS (v. 10.0); libkcapi-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-0:1.5.1-1.el10_2.src as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debuginfo-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debuginfo-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debuginfo-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debuginfo-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debugsource-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debugsource-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debugsource-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debugsource-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-debuginfo-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-debuginfo-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-debuginfo-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-debuginfo-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hmaccalc-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hmaccalc-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hmaccalc-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hmaccalc-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); and 86 more
    Red Hat Product Security ↗
  2. Vendor guidanceAuthoritative vendor guidance changed: added remediation: access.redhat.com/RHSA-2026:56985; removed remediation: access.redhat.com/RHSA-2026:69285; removed vendor advisory: access.redhat.com/RHSA-2026:69285.
    Before
    remediation: access.redhat.com/RHSA-2026:69285 · vendor advisory: access.redhat.com/CVE-2026-71226 · vendor advisory: access.redhat.com/RHSA-2026:69285 · 1 more references
    After
    remediation: access.redhat.com/RHSA-2026:56985 · vendor advisory: access.redhat.com/CVE-2026-71226 · vendor advisory: bugzilla.redhat.com/show_bug.cgi?id=2462114
    secalert@redhat.com ↗
  3. Vendor guidanceAuthoritative vendor guidance changed: added remediation: access.redhat.com/RHSA-2026:69285; added vendor advisory: access.redhat.com/RHSA-2026:69285; removed remediation: access.redhat.com/RHSA-2026:56985.
    Before
    remediation: access.redhat.com/RHSA-2026:56985 · vendor advisory: access.redhat.com/CVE-2026-71226 · vendor advisory: bugzilla.redhat.com/show_bug.cgi?id=2462114
    After
    remediation: access.redhat.com/RHSA-2026:69285 · vendor advisory: access.redhat.com/CVE-2026-71226 · vendor advisory: access.redhat.com/RHSA-2026:69285 · 1 more references
    access.redhat.com ↗
  4. Affected versionsThe structured affected or fixed version information changed.
    Before
    libkcapi: 0.12.0 < 1.5.1 · Fixed: Red Hat Enterprise Linux 10: 0:1.5.1-1.el10_2 < *; Red Hat Enterprise Linux 8: 0:1.4.0-3.el8_10 < *; Red Hat Enterprise Linux 9: 0:1.4.0-3.el9_8 < *; Red Hat Hardened Images: 1.5.1-0.1.hum1 < *
    After
    libkcapi: 0.12.0 < 1.5.1 · Fixed: Red Hat Enterprise Linux 10: 0:1.5.1-1.el10_2 < *; Red Hat Enterprise Linux 10.0 Extended Update Support: 0:1.5.0-6.el10_0 < *; Red Hat Enterprise Linux 8: 0:1.4.0-3.el8_10 < *; Red Hat Enterprise Linux 9: 0:1.4.0-3.el9_8 < *; Red Hat Hardened Images: 1.5.1-0.1.hum1 < *
    CNA ↗
  5. Vendor guidanceAuthoritative vendor guidance changed: added remediation: access.redhat.com/RHSA-2026:56985; removed remediation: access.redhat.com/RHSA-2026:67265; removed vendor advisory: access.redhat.com/RHSA-2026:67265; 2 further removals.
    Before
    remediation: access.redhat.com/RHSA-2026:67265 · vendor advisory: access.redhat.com/CVE-2026-71226 · vendor advisory: access.redhat.com/RHSA-2026:67265 · 3 more references
    After
    remediation: access.redhat.com/RHSA-2026:56985 · vendor advisory: access.redhat.com/CVE-2026-71226 · vendor advisory: bugzilla.redhat.com/show_bug.cgi?id=2462114
    secalert@redhat.com ↗
  6. Vendor guidanceAuthoritative vendor guidance changed: added remediation: access.redhat.com/RHSA-2026:67265; added vendor advisory: access.redhat.com/RHSA-2026:67265; removed remediation: access.redhat.com/RHSA-2026:56985; 2 further additions.
    Before
    remediation: access.redhat.com/RHSA-2026:56985 · vendor advisory: access.redhat.com/CVE-2026-71226 · vendor advisory: bugzilla.redhat.com/show_bug.cgi?id=2462114
    After
    remediation: access.redhat.com/RHSA-2026:67265 · vendor advisory: access.redhat.com/CVE-2026-71226 · vendor advisory: access.redhat.com/RHSA-2026:67265 · 3 more references
    access.redhat.com ↗
  7. Affected versionsThe structured affected or fixed version information changed.
    Before
    libkcapi: 0.12.0 < 1.5.1 · Fixed: Red Hat Hardened Images: 1.5.1-0.1.hum1 < *
    After
    libkcapi: 0.12.0 < 1.5.1 · Fixed: Red Hat Enterprise Linux 10: 0:1.5.1-1.el10_2 < *; Red Hat Enterprise Linux 8: 0:1.4.0-3.el8_10 < *; Red Hat Enterprise Linux 9: 0:1.4.0-3.el9_8 < *; Red Hat Hardened Images: 1.5.1-0.1.hum1 < *
    CNA ↗
  8. Vendor guidanceAuthoritative vendor guidance changed from remediation: access.redhat.com/CVE-2026-71226 to remediation: access.redhat.com/CVE-2026-71226.
    Before
    remediation: access.redhat.com/CVE-2026-71226
    After
    remediation: access.redhat.com/CVE-2026-71226
    Red Hat Product Security ↗
  9. Affected versionsThe structured affected or fixed version information changed.
    Before
    libkcapi-hasher as a component of Red Hat Enterprise Linux 10; libkcapi-hmaccalc as a component of Red Hat Enterprise Linux 10; libkcapi.src as a component of Red Hat Enterprise Linux 10; libkcapi-hmaccalc as a component of Red Hat Enterprise Linux 8; libkcapi.src as a component of Red Hat Enterprise Linux 8; libkcapi-hmaccalc as a component of Red Hat Enterprise Linux 9; libkcapi.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: libkcapi-main@aarch64 as a component of Red Hat Hardened Images; libkcapi-main@src as a component of Red Hat Hardened Images; libkcapi-main@x86_64 as a component of Red Hat Hardened Images
    After
    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: libkcapi-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-0:1.5.1-1.el10_2.src as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debuginfo-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debuginfo-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debuginfo-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debuginfo-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debugsource-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debugsource-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debugsource-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-debugsource-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-debuginfo-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-debuginfo-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-debuginfo-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hasher-debuginfo-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hmaccalc-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hmaccalc-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hmaccalc-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-hmaccalc-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-tests-debuginfo-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-tests-debuginfo-0:1.5.1-1.el10_2.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-tests-debuginfo-0:1.5.1-1.el10_2.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-tests-debuginfo-0:1.5.1-1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); libkcapi-tools-debuginfo-0:1.5.1-1.el10_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 10); and 81 more
    Red Hat Product Security ↗
  10. Affected versionsThe structured affected or fixed version information changed.
    Before
    libkcapi-hasher as a component of Red Hat Enterprise Linux 10; libkcapi-hmaccalc as a component of Red Hat Enterprise Linux 10; libkcapi.src as a component of Red Hat Enterprise Linux 10; libkcapi-hmaccalc as a component of Red Hat Enterprise Linux 8; libkcapi.src as a component of Red Hat Enterprise Linux 8; libkcapi-hmaccalc as a component of Red Hat Enterprise Linux 9; libkcapi.src as a component of Red Hat Enterprise Linux 9; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4 · Fixed: libkcapi-main@aarch64 as a component of Red Hat Hardened Images; libkcapi-main@src as a component of Red Hat Hardened Images; libkcapi-main@x86_64 as a component of Red Hat Hardened Images
    After
    libkcapi-hasher as a component of Red Hat Enterprise Linux 10; libkcapi-hmaccalc as a component of Red Hat Enterprise Linux 10; libkcapi.src as a component of Red Hat Enterprise Linux 10; libkcapi-hmaccalc as a component of Red Hat Enterprise Linux 8; libkcapi.src as a component of Red Hat Enterprise Linux 8; libkcapi-hmaccalc as a component of Red Hat Enterprise Linux 9; libkcapi.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: libkcapi-main@aarch64 as a component of Red Hat Hardened Images; libkcapi-main@src as a component of Red Hat Hardened Images; libkcapi-main@x86_64 as a component of Red Hat Hardened Images
    Red Hat Product Security ↗
  11. Affected versionsThe structured affected or fixed version information changed.
    Before
    0.12.0 < 1.5.1 · Fixed: 1.5.1-0.1.hum1 < *
    After
    libkcapi: 0.12.0 < 1.5.1 · Fixed: Red Hat Hardened Images: 1.5.1-0.1.hum1 < *
    CNA ↗
  12. Affected versionsThe structured affected or fixed version information changed.
    Before
    libkcapi-hasher as a component of Red Hat Enterprise Linux 10; libkcapi-hmaccalc as a component of Red Hat Enterprise Linux 10; libkcapi.src as a component of Red Hat Enterprise Linux 10; libkcapi-hmaccalc as a component of Red Hat Enterprise Linux 8; libkcapi.src as a component of Red Hat Enterprise Linux 8; libkcapi-hmaccalc as a component of Red Hat Enterprise Linux 9; libkcapi.src as a component of Red Hat Enterprise Linux 9; rhcos as a component of Red Hat OpenShift Container Platform 4 · Fixed: libkcapi-main@aarch64 as a component of Red Hat Hardened Images; libkcapi-main@src as a component of Red Hat Hardened Images; libkcapi-main@x86_64 as a component of Red Hat Hardened Images
    After
    libkcapi-hasher as a component of Red Hat Enterprise Linux 10; libkcapi-hmaccalc as a component of Red Hat Enterprise Linux 10; libkcapi.src as a component of Red Hat Enterprise Linux 10; libkcapi-hmaccalc as a component of Red Hat Enterprise Linux 8; libkcapi.src as a component of Red Hat Enterprise Linux 8; libkcapi-hmaccalc as a component of Red Hat Enterprise Linux 9; libkcapi.src as a component of Red Hat Enterprise Linux 9; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4 · Fixed: libkcapi-main@aarch64 as a component of Red Hat Hardened Images; libkcapi-main@src as a component of Red Hat Hardened Images; libkcapi-main@x86_64 as a component of Red Hat Hardened Images
    Red Hat Product Security ↗
  13. Vendor guidanceAuthoritative vendor guidance changed: removed vendor advisory: access.redhat.com/RHSA-2026:56985.
    Before
    remediation: access.redhat.com/RHSA-2026:56985 · vendor advisory: access.redhat.com/CVE-2026-71226 · vendor advisory: access.redhat.com/RHSA-2026:56985 · 1 more references
    After
    remediation: access.redhat.com/RHSA-2026:56985 · vendor advisory: access.redhat.com/CVE-2026-71226 · vendor advisory: bugzilla.redhat.com/show_bug.cgi?id=2462114
    secalert@redhat.com ↗
  14. Vendor guidanceAuthoritative vendor guidance changed: added remediation: access.redhat.com/RHSA-2026:56985; added vendor advisory: access.redhat.com/RHSA-2026:56985.
    Before
    vendor advisory: access.redhat.com/CVE-2026-71226 · vendor advisory: bugzilla.redhat.com/show_bug.cgi?id=2462114
    After
    remediation: access.redhat.com/RHSA-2026:56985 · vendor advisory: access.redhat.com/CVE-2026-71226 · vendor advisory: access.redhat.com/RHSA-2026:56985 · 1 more references
    access.redhat.com ↗
  15. Affected versionsThe structured affected or fixed version information changed.
    Before
    0.12.0 < 1.5.1 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    0.12.0 < 1.5.1 · Fixed: 1.5.1-0.1.hum1 < *
    CNA ↗
  16. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    access.redhat.com ↗
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-2026-53375↗Vendor advisory↗Vendor advisory↗CVE authority or vendor reference · Red Hat RHSA-2026:56985↗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-2026-71226 · cve.blacktree.nl