CVEvulnerability
CVE-2026-0966
8.2 HIGH
Official page ↗
- Status
- Modified
- Published
- 2026-03-26
- Last modified
- 2026-09-01
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 8.2 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
- CVSS 3.0 ([email protected])
- 6.5 MEDIUM — CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
- Weaknesses
- CWE-124
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.
Affected configurations
• libssh libssh (< 0.11.4)
• redhat hardened images
• redhat openshift container platform 4.0
• redhat enterprise linux 8.0
• redhat enterprise linux 9.0
• redhat enterprise linux 10.0
Related
Weakness · CWE (1)
- CWE-124 Buffer Underwrite weakness
References
- https://access.redhat.com/errata/RHSA-2026:18160 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:18683 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:7067 Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2026-0966 Mitigation, Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2433121 Issue Tracking, Vendor Advisory
- https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/ Release Notes