Advisoriesby IbisRed HatCVE-2026-71227
Red Hat libkcapi: denial of service
Fix: upgrade to 1.5.1 or later
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Red Hat OpenShift Container Platform 4 Product | all versions | No fix yet |
| all versions | No fix yet | |
| Red Hat OpenShift Container Platform 5 Product | all versions | No fix yet |
| libkcapi Product | >= 0.12.0, < 1.5.1 | 1.5.1 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-835
- www.cve.org/CVERecord?id=CVE-2026-71227
- nvd.nist.gov/vuln/detail/CVE-2026-71227
- access.redhat.com/errata/RHSA-2026:56985
- access.redhat.com/errata/RHSA-2026:67265
- access.redhat.com/errata/RHSA-2026:67266
- access.redhat.com/errata/RHSA-2026:67267
- access.redhat.com/errata/RHSA-2026:69285
- access.redhat.com/errata/RHSA-2026:87712
- access.redhat.com/security/cve/CVE-2026-71227
- bugzilla.redhat.com/show_bug.cgi?id=2462867