CVE-2025-5372
Libssh: incorrect return code handling in ssh_kdf() in libssh
We use these services and cookies to improve your user experience. You may opt out if you wish, however, this may limit some features on this site.
Please see our statement on Data Privacy.
Libssh: incorrect return code handling in ssh_kdf() in libssh
A flaw was found in libssh versions built with OpenSSL versions older than 3.0, specifically in the ssh_kdf() function responsible for key derivation. Due to inconsistent interpretation of return values where OpenSSL uses 0 to indicate failure and libssh uses 0 for success—the function may mistakenly return a success status even when key derivation fails. This results in uninitialized cryptographic key buffers being used in subsequent communication, potentially compromising SSH sessions' confidentiality, integrity, and availability.
Reserved 2025-05-30 | Published 2025-07-04 | Updated 2025-07-08 | Assigner redhat| 2025-05-30: | Reported to Red Hat. |
| 2025-06-24: | Made public. |
access.redhat.com/security/cve/CVE-2025-5372
bugzilla.redhat.com/show_bug.cgi?id=2369388 (RHBZ#2369388)
Support options
