CVE-2026-55654
LOW EPSS 22.5%
Published Jun 23, 20261w ago · Modified Jun 23, 20266d ago
3.7 CVSS 3.1
Published Jun 23, 2026 1w ago
Last Modified Jun 23, 2026 6d ago
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 Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability Low
Threat Intelligence
EPSS Exploit Probability
22.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-125 Out-of-bounds Read Memory Safety
References 2
- access.redhat.com https://access.redhat.com/security/cve/CVE-2026-55654
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2462493
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.