Medium [CVE-2026-71225] IV reuse in libkcapi one-shot symmetric cipher chunking causes cipher state reset across chunk boundaries
This medium-severity Red Hat Linux advisory covers CVE-2026-71225 affecting Red Hat Hardened Images, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Android app · Google Play
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.
Summary
IV reuse in libkcapi one-shot symmetric cipher chunking causes cipher state reset across chunk boundaries. Red Hat rates this moderate (CVSS 6.5).
Weakness: CWE-330. Red Hat lists fixing advisory RHSA-2026:56985 with package libkcapi-main-1.5.1-0.1.hum1.
Affected products named by the advisory: Red Hat Hardened Images; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; and 1 more.
Affected products named by the advisory: Red Hat OpenShift Container Platform 4; Red Hat Enterprise Linux 10.0 Extended Update Support.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- libkcapi-main-1.5.1-0.1.hum1
- RHSA-2026:56985
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- To mitigate this issue, applications using `libkcapi` should avoid the one-shot symmetric cipher APIs for inputs exceeding 64 KiB when continuous-message semantics are critical. Instead, prefer the streaming interface for processing large messages, or ensure one-shot inputs remain below the internal chunking threshold to guarantee the IV is applied consistently throughout the operation.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.