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CVE PROGRAM SOURCE RECORD3.7 Low

CVE-2026-55654

Openssh: heap out-of-bounds read in red hat enterprise linux versions of openssh gssapi indicator cleanup due to missing null sentinel termination

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Status
Published
Published
Updated
Assigning organization
redhat

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Red Hat Red Hat Enterprise Linux 10

Default version status: affected

  • 0:9.9p1-25.el10_2 to < *unaffected

Red Hat Red Hat Enterprise Linux 9

Default version status: affected

  • 0:9.9p1-9.el9_8 to < *unaffected

Red Hat Red Hat Enterprise Linux 9

Default version status: affected

  • 0:9.9p1-9.el9_8 to < *unaffected

Red Hat Red Hat Hardened Images

Default version status: affected

  • 10.3p1-6.hum1 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1786435483 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1786533529 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1787135742 to < *unaffected

Red Hat Red Hat Update Infrastructure 5

Default version status: affected

  • 1787241260 to < *unaffected

Red Hat Red Hat Enterprise Linux 6

Default version status: unaffected

Red Hat Red Hat Enterprise Linux 7

Default version status: unaffected

Red Hat Red Hat Enterprise Linux 8

Default version status: unaffected

Red Hat Red Hat OpenShift Container Platform 4

Default version status: affected

Red Hat Red Hat OpenShift Container Platform 4

Default version status: affected

References