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high · CVSS 7.3

CVE-2026-71226

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

Published 5 Aug 2026 · Source updated 2 Nov 2026 · Retrieved 2026-11-04 15:50 UTC · This record may be stale; verify the source

Statance checks for CVE-2026-71226. Connected servers are checked automatically against the fixed versions their distribution or package ecosystem has published for it, including app dependency lockfiles. Check my servers ↗
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What happened?

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.

Description supplied by CVE Program. Formatting is simplified; follow the original advisory for full details.

Affected software and versions

Source-provided software and version information
SoftwareVersion informationFixed version
libkcapiStephan Muelleaffected: 0.12.0 to < 1.5.1See vendor advisory
libkcapiRed Hatunaffected: 0:1.5.1-1.el10_2 to < *See vendor advisory
libkcapiRed Hatunaffected: 0:1.5.0-6.el10_0 to < *See vendor advisory
libkcapiRed Hatunaffected: 0:1.4.0-3.el8_10 to < *See vendor advisory
libkcapiRed Hatunaffected: 0:1.2.0-3.el8_8.1 to < *See vendor advisory
libkcapiRed Hatunaffected: 0:1.2.0-3.el8_8.1 to < *See vendor advisory
libkcapiRed Hatunaffected: 0:1.4.0-3.el9_8 to < *See vendor advisory
libkcapiRed Hatunaffected: 0:1.4.0-2.el9_6.1 to < *See vendor advisory
libkcapi-mainRed Hatunaffected: 1.5.1-0.1.hum1 to < *See vendor advisory
openshift/ose-rhel-coreos-8Red HatDefault status: affectedSee vendor advisory
openshift/ose-rhel-coreos-9Red HatDefault status: affectedSee vendor advisory
openshift/ose-rhel-coreos-9Red HatDefault status: affectedSee vendor advisory

Version information comes from the source record and can include unaffected products and exceptions. Distribution packages may contain backported fixes: an older upstream version alone does not prove a server is affected.

Is it being exploited?

This CVE was not listed in the CISA catalogue at our last retrieval. This does not establish that exploitation is absent.

CISA data retrieved 2026-11-06 16:38 UTC. Check CISA ↗

How to respond

  1. Confirm the product, installed package version, and any configuration requirements in the vendor advisory.
  2. Follow the vendor’s remediation or workaround guidance in the references below. Structured fixed-version data is unavailable here; the publisher’s description may include a fix or workaround.
  3. Restart affected services if required, then verify the running version. Known exploitation may warrant investigation as well as patching.

Sources and remediation references

This public advisory does not determine whether a particular server is affected. Records are refreshed as sources change; verify urgent decisions against the original advisory.

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