CVE-2026-71226

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

CVE-2026-71226 is fixed in 3 products on 1 platform, first by RHSA-2026:69285, released August 5, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.3

Important

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0015

3rd percentile

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.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
libkcapi · Debian 14	1.5.1-1	DEBIAN-CVE-2026-71226	Aug 5, 2026
libkcapi · RHEL 10	1.5.0-6.el10_0	RHSA-2026:69285	Aug 5, 2026
libkcapi · RHEL 8	0:1.4.0-3.el8_10	RHSA-2026:67266	Sep 19, 2026
libkcapi · RHEL 9	0:1.4.0-3.el9_8	RHSA-2026:67265	Sep 19, 2026
libkcapi · almalinux 10	1.5.1-1.el10_2	ALSA-2026:67267	Sep 14, 2026
libkcapi · almalinux 8	1.4.0-3.el8_10	ALSA-2026:67266	Sep 14, 2026
libkcapi · almalinux 9	1.4.0-3.el9_8	ALSA-2026:67265	Sep 14, 2026
libkcapi · ol 10	0:1.5.1-1.0.1.el10_2	ELSA-2026-67267-0	Sep 15, 2026
libkcapi · ol 8	0:1.4.0-3.0.1.el8_10	ELSA-2026-67266-0	Sep 14, 2026
libkcapi · ol 9	0:1.4.0-3.0.1.el9_8	ELSA-2026-67265-0	Sep 14, 2026
libkcapi · rocky 10	0:1.5.1-1.el10_2	RLSA-2026:67267	Sep 15, 2026
libkcapi · rocky 8	0:1.4.0-3.el8_10	RLSA-2026:67266	Sep 15, 2026
libkcapi · rocky 9	0:1.4.0-3.el9_8	RLSA-2026:67265	Sep 15, 2026
libkcapi-hasher · almalinux 10	1.5.1-1.el10_2	ALSA-2026:67267	Sep 14, 2026
libkcapi-hasher · ol 10	0:1.5.1-1.0.1.el10_2	ELSA-2026-67267-0	Sep 15, 2026
libkcapi-hmaccalc · RHEL 8	0:1.4.0-3.el8_10	RHSA-2026:67266	Sep 19, 2026
libkcapi-hmaccalc · RHEL 9	0:1.4.0-3.el9_8	RHSA-2026:67265	Sep 19, 2026
libkcapi-hmaccalc · almalinux 10	1.5.1-1.el10_2	ALSA-2026:67267	Sep 14, 2026
libkcapi-hmaccalc · almalinux 8	1.4.0-3.el8_10	ALSA-2026:67266	Sep 14, 2026
libkcapi-hmaccalc · almalinux 9	1.4.0-3.el9_8	ALSA-2026:67265	Sep 14, 2026
libkcapi-hmaccalc · ol 10	0:1.5.1-1.0.1.el10_2	ELSA-2026-67267-0	Sep 15, 2026
libkcapi-hmaccalc · ol 8	0:1.4.0-3.0.1.el8_10	ELSA-2026-67266-0	Sep 14, 2026
libkcapi-hmaccalc · ol 9	0:1.4.0-3.0.1.el9_8	ELSA-2026-67265-0	Sep 14, 2026

Details

Published
August 5, 2026
Weakness
Use After Free
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-71226

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