CVEvulnerability
CVE-2026-55654
3.7 LOW
Official page ↗
- Status
- Modified
- Published
- 2026-06-23
- Last modified
- 2026-09-24
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 3.7 LOW — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
- Weaknesses
- CWE-125
Description
A flaw was found in OpenSSH. This vulnerability, a heap out-of-bounds read, occurs during the cleanup of GSSAPI (Generic Security Service Application Programming Interface) indicators when a trailing NULL termination is missing in the auth-indicators array. A remote attacker, under specific configurations involving GSSAPI authentication and a Kerberos environment, could exploit this to cause the SSH authentication path to crash or abort. This leads to a denial of service (DoS), impacting the availability of the SSH service.
Affected configurations
• openbsd openssh
• redhat hardened images
• redhat enterprise linux 6.0
• redhat enterprise linux 7.0
• redhat enterprise linux 8.0
• redhat enterprise linux 9.0
• redhat enterprise linux 10.0
Related
Weakness · CWE (1)
- CWE-125 Out-of-bounds Read weakness
References
- https://access.redhat.com/errata/RHSA-2026:36759 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:47756 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:47757 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:54387 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:58981 access.redhat.com
- https://access.redhat.com/security/cve/CVE-2026-55654 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2462493 Exploit, Issue Tracking, Vendor Advisory