Vulnerability Details CVE-2026-55654
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 25.0%
CVSS Severity
CVSS v3 Score 3.7
References
Products affected by CVE-2026-55654
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cpe:2.3:a:openbsd:openssh:-
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cpe:2.3:a:redhat:hardened_images:-
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cpe:2.3:o:redhat:enterprise_linux:10.0
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cpe:2.3:o:redhat:enterprise_linux:6.0
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cpe:2.3:o:redhat:enterprise_linux:7.0
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cpe:2.3:o:redhat:enterprise_linux:8.0
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cpe:2.3:o:redhat:enterprise_linux:9.0