medium5.0
CVE-2025-5372
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.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Libssh | Libssh | before 0.11.2 |
| Redhat | Openshift Container Platform | Version 4.0 |
| Redhat | Enterprise Linux | Versions 6.0, 7.0, 8.0, 9.0, 10.0 |
Weakness classification
References
- NVD record
- CVE.org record
- https://access.redhat.com/errata/RHSA-2025:21977
- https://access.redhat.com/errata/RHSA-2025:23024
- https://access.redhat.com/errata/RHSA-2026:20610
- https://access.redhat.com/errata/RHSA-2026:24349
- https://access.redhat.com/errata/RHSA-2026:25911
- https://access.redhat.com/security/cve/CVE-2025-5372
- https://bugzilla.redhat.com/show_bug.cgi?id=2369388