Riskcovery

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

State
Published
Severity
3.7 Low
Published
Jun 23, 2026
Updated
Sep 24, 2026
Reserved
Jun 16, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.13.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:Lredhat

Weaknesses

Affected Products

ProductVersions
Red Hat Enterprise Linux 10Red Hat
  • 0:9.9p1-25.el10_2 and laterNot affected
Red Hat Enterprise Linux 9Red Hat
  • 0:9.9p1-9.el9_8 and laterNot affected
Red Hat Enterprise Linux 9Red Hat
  • 0:9.9p1-9.el9_8 and laterNot affected
Red Hat Hardened ImagesRed Hat
  • 10.3p1-6.hum1 and laterNot affected
Red Hat Update Infrastructure 5Red Hat
  • 1786435483 and laterNot affected
Red Hat Update Infrastructure 5Red Hat
  • 1786533529 and laterNot affected
Red Hat Update Infrastructure 5Red Hat
  • 1787135742 and laterNot affected
Red Hat Update Infrastructure 5Red Hat
  • 1787241260 and laterNot affected
Red Hat Enterprise Linux 6Red Hat
    Red Hat Enterprise Linux 7Red Hat
      Red Hat Enterprise Linux 8Red Hat
        Red Hat OpenShift Container Platform 4Red Hat
          Red Hat OpenShift Container Platform 4Red Hat

            References

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