VULNERABILITY INTELLIGENCE

CVE-2026-55654

CVSS score3.7 LOW
EPSS probability0.65%
CISA KEVNot currently listed
Published2026-06-23
Last modified2026-09-24
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

Weakness classification

  • secalert@redhat.com: CWE-125

Primary references