Vulnerability in Smuellerdd Libkcapi
CVE-2026-71227
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.1 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (9.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Smuellerdd Libkcapi
- Stephan Muelle Libkcapi — versions 0.12.0
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Hardened Images
- Red Hat Openshift Container Platform 4
- Red Hat Openshift Container Platform 5
- Red Hat Enterprise Linux — versions 8.0, 9.0, 10.0
- Red Hat Hardened Images
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-71227 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Exploit, Issue Tracking, Vendor Advisory)
- access.redhat.com/errata/RHSA-2026:56985 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:67266 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:67265 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:67267 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:69285 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:87712 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-71227?
- CVE-2026-71227 is a medium-severity vulnerability in Smuellerdd Libkcapi, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.1/10. Published 2026-08-05.
- How severe is CVE-2026-71227?
- Medium severity. CVSS v3 base score is 5.1 out of 10.