CVE-2026-71225

Name
CVE-2026-71225
Description
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.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
secalert@redhat.com https://access.redhat.com/security/cve/CVE-2026-71225
secalert@redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2462011
secalert@redhat.com https://access.redhat.com/errata/RHSA-2026:56985

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:* hardened_images == None == -
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* openshift_container_platform == None == 4.0
cpe:2.3:a:smuellerdd:libkcapi:*:*:*:*:*:*:*:* libkcapi >= 0.10.1 < 1.5.1
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* enterprise_linux == None == 8.0
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* enterprise_linux == None == 9.0
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* enterprise_linux == None == 10.0

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
libkcapi edge-main 1.5.1-r0 None fixed
libkcapi edge-main 1.5.0-r1 None possibly vulnerable
libkcapi 3.24-main 1.5.1-r0 None fixed
libkcapi 3.24-main 1.5.0-r1 None possibly vulnerable
libkcapi 3.23-main 1.5.1-r0 None fixed
libkcapi 3.23-main 1.5.0-r1 None possibly vulnerable
libkcapi 3.22-main 1.5.1-r0 None fixed
libkcapi 3.22-main 1.5.0-r1 None possibly vulnerable
libkcapi 3.21-main 1.5.1-r0 None fixed
libkcapi 3.21-main 1.5.0-r1 None possibly vulnerable
libkcapi 3.20-main 1.4.0-r4 None possibly vulnerable
libkcapi 3.19-main 1.4.0-r4 None possibly vulnerable