Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| libssh / libssh | affected 0 before 0.11.2 |
| Red Hat / Red Hat Enterprise Linux 8 | unaffected 0:0.9.6-16.el8_10 before * |
| Red Hat / Red Hat Enterprise Linux 8 | unaffected 0:0.9.6-16.el8_10 before * |
| Red Hat / Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | unaffected 0:0.9.4-2.el8_4.2 before * |
| Red Hat / Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | unaffected 0:0.9.4-2.el8_4.2 before * |
| Red Hat / Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | unaffected 0:0.9.6-4.el8_6.2 before * |
| Red Hat / Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | unaffected 0:0.9.6-4.el8_6.2 before * |
| Red Hat / Red Hat Enterprise Linux 8.8 Telecommunications Update Service | unaffected 0:0.9.6-13.el8_8.2 before * |
| Red Hat / Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | unaffected 0:0.9.6-13.el8_8.2 before * |
| Red Hat / Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions | unaffected 0:0.9.6-3.el9_0.2 before * |
| Red Hat / Red Hat Enterprise Linux 10 | unaffected |
| Red Hat / Red Hat Enterprise Linux 6 | unknown |
| Red Hat / Red Hat Enterprise Linux 7 | unknown |
| Red Hat / Red Hat Enterprise Linux 9 | affected |
| Red Hat / Red Hat OpenShift Container Platform 4 | affected |
| Red Hat / Red Hat OpenShift Container Platform 4 | unaffected |
CWE
CWE-682
References
- 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
ADP enrichment
No English description supplied.
No references supplied.