Use After Free in Smuellerdd Libkcapi
CVE-2026-71226
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.
Vulnerability class: Use-After-Free
EPSS: 0.001 (3.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H.
Affected products
- Smuellerdd Libkcapi
- Stephan Muelle Libkcapi
- 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
- Redhat Enterprise_linux — versions 8.0, 9.0, 10.0
- Redhat Hardened_images
- Redhat Openshift_container_platform — versions 4.0
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Issue Tracking, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
Frequently asked questions
- What is CVE-2026-71226?
- CVE-2026-71226 is a high-severity vulnerability in Smuellerdd Libkcapi, classified under Use After Free. CVSS score: 7.3/10. Published 2026-08-05.
- How severe is CVE-2026-71226?
- High severity. CVSS v3 base score is 7.3 out of 10.