Vulnerability 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.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openbsd | Openssh | - |
| Redhat | Hardened Images | - |
| Redhat | Enterprise Linux | 6.0 |
Related Weaknesses (CWE)
References
- https://access.redhat.com/errata/RHSA-2026:36759
- https://access.redhat.com/errata/RHSA-2026:47756
- https://access.redhat.com/errata/RHSA-2026:47757
- https://access.redhat.com/errata/RHSA-2026:54387
- https://access.redhat.com/security/cve/CVE-2026-55654Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2462493ExploitIssue TrackingVendor Advisory
FAQ
What is CVE-2026-55654?
CVE-2026-55654 is a vulnerability with a CVSS score of 3.7 (LOW). 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 ...
How severe is CVE-2026-55654?
CVE-2026-55654 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-55654?
Check the references section above for vendor advisories and patch information. Affected products include: Openbsd Openssh, Redhat Hardened Images, Redhat Enterprise Linux.