Medium 5.1Published Aug 5, 2026

CVE-2026-71227Libkcapi: infinite loop denial of service in libkcapi _kcapi_aio_read_all() due to unhandled io_getevents() timeout return

Updated under an hour ago (Oct 27, 2026, 12:00 PM ET)

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It affects Stephan Muelle libkcapi and 8 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Stephan Muelle libkcapi

Exploited in the last 30 days

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.

CVSS: 5.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-835
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Modified
Record last updated: Oct 22, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Stephan Muelle libkcapi stephan_muelle:libkcapi (from the name)	from 0.12.0 before 1.5.1	CNA record
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	from 0:1.5.1-1.el10_2 not affected	CNA record
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus	from 0:1.5.0-6.el10_0 not affected	CNA record
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support redhat:rhel_eus	from 0:1.4.0-2.el9_6.1 not affected	CNA record
Red Hat Red Hat Hardened Images redhat:hummingbird	from 1.5.1-0.1.hum1 not affected	CNA record
Red Hat Red Hat OpenShift Container Platform 4 redhat:openshift	4	CNA record
redhat hardened_images redhat:hardened_images	all versions	NVD
redhat openshift_container_platform redhat:openshift_container_platform	4.0	NVD
smuellerdd libkcapi smuellerdd:libkcapi	from 0.12.0 before 1.5.1	NVD
redhat enterprise_linux redhat:enterprise_linux	8.0; 9.0; 10.0	NVD

References

References

https://access.redhat.com/errata/RHSA-2026:56985	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:67265	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:67266	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:67267	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:69285	vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2026:87712	vendor-advisory, x-refsource-redhat
https://access.redhat.com/security/cve/CVE-2026-71227	vdb-entry, x-refsource-redhat, vendor-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2462867	issue-tracking, x-refsource-redhat, exploit, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.