CVE record · CVE-2026-71225

Libkcapi: iv reuse in libkcapi one-shot symmetric cipher chunking causes cipher state reset across chunk boundaries

CVSS 6.5 MediumEPSS 0.0034 · 28th percentile

Published by the CVE Program (CNA: redhat) at 5 Aug 2026, 12:16 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Stephan Muelle	libkcapi	affected 0.10.1 to before 1.5.1 semver Other versions: unaffected
Red Hat	Red Hat Enterprise Linux 10 Package name: libkcapi https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.5.1-1.el10_2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support Package name: libkcapi https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.5.0-6.el10_0 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8 Package name: libkcapi https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.4.0-3.el8_10 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9 Package name: libkcapi https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.4.0-3.el9_8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support Package name: libkcapi https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.4.0-2.el9_6.1 to before * rpm Other versions: affected
Red Hat	Red Hat Hardened Images Package name: libkcapi-main https://catalog.redhat.com/software/containers/	unaffected 1.5.1-0.1.hum1 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4 Package name: openshift/ose-rhel-coreos-8 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 5 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected

Identifiers: CVE-2026-71225
CNA: redhat
Weakness (CWE): CWE-330
Tags: Stephan Muelle libkcapi
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 10.0 Extended Update Support
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Red Hat Enterprise Linux 9.6 Extended Update Support
Red Hat Hardened Images
Red Hat OpenShift Container Platform 4
Weak cryptography or TLS
Published: 5 Aug 2026
Updated: 2 Nov 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.5	Medium	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N	CNA (redhat)

CISA KEV Not listed.
EPSS 0.0034, the 28th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

5 Aug 2026, 12:16 UTC Confirmed by the CVE List
5 Aug 2026, 13:24 UTC Confirmed by NVD

Sources

References from the CNA

access.redhat.com/errata/RHSA-2026:56985 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:67265 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:67266 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:67267 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:69285 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:87712 vendor-advisoryredhat
access.redhat.com/security/cve/CVE-2026-71225 vdb-entryredhat
bugzilla.redhat.com/show_bug.cgi?id=2462011 issue-trackingredhat

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.