CVE-2026-71227

Libkcapi: infinite loop denial of service in libkcapi _kcapi_aio_read_all() due to unhandled io_getevents() timeout return

State: Published
Severity: 5.1 Medium
Published: Aug 5, 2026
Updated: Nov 2, 2026
Reserved: Aug 5, 2026

Read the record on cve.org

Description

A flaw was found in libkcapi. A local attacker can influence an application that uses the Asynchronous Input/Output (AIO) interface. By reusing an AIO-enabled handle after a prior completion error, the _kcapi_aio_read_all() function can enter a non-terminating wait loop. This can lead to a persistent denial of service, making the affected application or thread unresponsive.

Scores

CVSS	Score	Vector	Source
3.1	5.1 Medium	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H	redhat

Weaknesses

CWE-835 Loop with Unreachable Exit Condition

Affected Products

Product	Versions
libkcapiStephan Muelle	0.12.0 to before 1.5.1Affected
Red Hat Enterprise Linux 10Red Hat	0:1.5.1-1.el10_2 and laterNot affected
Red Hat Enterprise Linux 10.0 Extended Update SupportRed Hat	0:1.5.0-6.el10_0 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	0:1.4.0-3.el8_10 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:1.4.0-3.el9_8 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat	0:1.4.0-2.el9_6.1 and laterNot affected
Red Hat Hardened ImagesRed Hat	1.5.1-0.1.hum1 and laterNot affected
Red Hat OpenShift Container Platform 4Red Hat
Red Hat OpenShift Container Platform 4Red Hat
Red Hat OpenShift Container Platform 5Red Hat

References

RHSA-2026:56985vendor-advisory
RHSA-2026:67265vendor-advisory
RHSA-2026:67266vendor-advisory
RHSA-2026:67267vendor-advisory
RHSA-2026:69285vendor-advisory
RHSA-2026:87712vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-71227vdb-entry
RHBZ#2462867issue-tracking

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