CVE-2026-71225: A flaw was found in libkcapi. When performing one-shot symmetric cipher operations on large inputs (over 64 KiB) in…
CVE-2026-71225 · Severity: medium · CVSS 6.5 · Published 2026-08-05
A flaw was found in libkcapi. When performing one-shot symmetric cipher operations on large inputs (over 64 KiB) in stateful modes such as Counter (CTR) or Cipher Block Chaining (CBC), the library improperly reuses the Initialization Vector (IV) for each internal data chunk. A remote attacker could potentially exploit this by making an application that uses libkcapi process specially crafted large inputs. This can lead to a significant weakening of data confidentiality, as the repeated IV use can expose relationships in encrypted plaintext, and may also affect data integrity by causing incorrect cryptographic processing.
No. Junglewise Threat Intelligence has no report of CVE-2026-71225 being exploited in the wild.
How severe is CVE-2026-71225?
Medium severity, with a CVSS score of 6.5, published 5 August 2026.
Which products and versions are affected?
Redhat Enterprise Linux, Redhat Hardened Images, Redhat Openshift Container Platform, Smuellerdd Libkcapi. The advisory does not name versions.
Is there a fix for CVE-2026-71225?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-71225?
Check whether you run Redhat Enterprise Linux, Redhat Hardened Images, Redhat Openshift Container Platform or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.