Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Stephan Muelle / libkcapi | affected 0.10.1 before 1.5.1 |
| Red Hat / Red Hat Enterprise Linux 10 | unaffected 0:1.5.1-1.el10_2 before * |
| Red Hat / Red Hat Enterprise Linux 10.0 Extended Update Support | unaffected 0:1.5.0-6.el10_0 before * |
| Red Hat / Red Hat Enterprise Linux 8 | unaffected 0:1.4.0-3.el8_10 before * |
| Red Hat / Red Hat Enterprise Linux 9 | unaffected 0:1.4.0-3.el9_8 before * |
| Red Hat / Red Hat Enterprise Linux 9.6 Extended Update Support | unaffected 0:1.4.0-2.el9_6.1 before * |
| Red Hat / Red Hat Hardened Images | unaffected 1.5.1-0.1.hum1 before * |
| Red Hat / Red Hat OpenShift Container Platform 4 | affected |
| Red Hat / Red Hat OpenShift Container Platform 4 | affected |
CWE
CWE-330
References
- https://access.redhat.com/errata/RHSA-2026:56985
- https://access.redhat.com/errata/RHSA-2026:67265
- https://access.redhat.com/errata/RHSA-2026:67266
- https://access.redhat.com/errata/RHSA-2026:67267
- https://access.redhat.com/errata/RHSA-2026:69285
- https://access.redhat.com/errata/RHSA-2026:87712
- https://access.redhat.com/security/cve/CVE-2026-71225
- https://bugzilla.redhat.com/show_bug.cgi?id=2462011
ADP enrichment
No English description supplied.
No references supplied.