CVE-2026-0966
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.
Key facts
- CVSS score
- 8.2 (v3.1)
- Severity
- HIGH
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H- Weakness (CWE)
- CWE-124
- EPSS score
- 0.6% (46th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2026-16330)
- Published
- March 26, 2026
- NVD last modified
- September 1, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2026-16330 in the EU Vulnerability Database. Last updated in EUVD on September 1, 2026.
View on the EU Vulnerability DatabaseAffected products
- libssh / libssh
- redhat / enterprise linux
- redhat / enterprise linux
- redhat / enterprise linux
- redhat / hardened images
- redhat / openshift container platform
Certified products that may be affected
31 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Red Hat Enterprise Linux 8 NSS Cryptographic Module - Red Hat, Inc. - FIPS 140 5513 - active
- Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, LLC - FIPS 140 5461 - active
- Red Hat Enterprise Linux 9 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5445 - active
- Red Hat Enterprise Linux 9 libgcrypt - Red Hat, Inc. - FIPS 140 5366 - active
- Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5089 - active
See all 31 in the Security Certifications Explorer.
References
- https://access.redhat.com/errata/RHSA-2026:18160
- https://access.redhat.com/errata/RHSA-2026:18683
- 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)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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