CVE-2026-71226

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

HIGH
7.3
CVSS Score
Published: August 5, 2026 at 12:37 PM UTC
Updated: October 22, 2026 at 09:17 PM UTC
5 products affected across 3 vendorsEnterprise LinuxOpenShift Container PlatformHardened Images

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Severity
HIGH7.3
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vendor states this is fixed in 0:1.4.0-2.el9_6.1 (unaffected)
Vendor states this is fixed in 0:1.4.0-3.el8_10 (unaffected)
Vendor states this is fixed in 0:1.4.0-3.el9_8 (unaffected)
Vendor states this is fixed in 0:1.5.0-6.el10_0 (unaffected)
Vendor states this is fixed in 0:1.5.1-1.el10_2 (unaffected)
All versions1
Vendor states this is fixed in 1.5.1-0.1.hum1 (unaffected)
0.12.0 ≤ v < 1.5.1
Affected range stops below 1.5.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.5.1, so it looks safe — our inference, not a vendor statement

References (8)

VDB Entryx_refsource_REDHATVendor Advisory
Source: cverecord
https://access.redhat.com/security/cve/CVE-2026-71226
Issue Trackingx_refsource_REDHATVendor Advisory
Source: cverecord
https://bugzilla.redhat.com/show_bug.cgi?id=2462114
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:56985
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:67266
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:67265
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:67267
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:69285
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:87712

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.3HIGHredhat
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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