Description
A flaw was found in libssh. The API function `ssh_get_hexa()` is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI (Generic Security Service Application Program Interface) authentication if the server's logging verbosity is set to `SSH_LOG_PACKET (3)` or higher. Successful exploitation could lead to a self-Denial of Service of the per-connection daemon process.
Metrics
CVSS 3.1 8.2/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Red Hat | Red Hat Hardened Images | — |
| Red Hat | Red Hat Enterprise Linux 6 | — |
| Red Hat | Red Hat Enterprise Linux 7 | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Hardened Images | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — |
References
- https://access.redhat.com/errata/RHSA-2026:18160
- https://access.redhat.com/errata/RHSA-2026:18683
- https://access.redhat.com/errata/RHSA-2026:7067Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-0966Mitigation, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2433121Issue Tracking, Vendor Advisory
- https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/Release Notes
Timeline
- Published
- Mar 26, 2026
- Last modified
- Nov 5, 2026
- NVD status
- Modified