CVE-2026-55654
Discovered by AISLEPUBLISHEDCWE-125
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 Base Scores
CVSS v3.1(Primary)
3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected Products
| Vendor | Product | Version | Status |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | 0:9.9p1-25.el10_2 | unaffected |
| Red Hat | Red Hat Enterprise Linux 10 | 0:9.9p1-9.el9_8 | — |
| Red Hat | Red Hat Enterprise Linux 10 | 10.3p1-6.hum1 | — |
| Red Hat | Red Hat Enterprise Linux 9 | 0:9.9p1-25.el10_2 | unaffected |
| Red Hat | Red Hat Enterprise Linux 9 | 0:9.9p1-9.el9_8 | — |
| Red Hat | Red Hat Enterprise Linux 9 | 10.3p1-6.hum1 | — |
| Red Hat | Red Hat Hardened Images | 0:9.9p1-25.el10_2 | unaffected |
| Red Hat | Red Hat Hardened Images | 0:9.9p1-9.el9_8 | — |
| Red Hat | Red Hat Hardened Images | 10.3p1-6.hum1 | — |
| Red Hat | Red Hat Enterprise Linux 6 | 0:9.9p1-25.el10_2 | unaffected |
| Red Hat | Red Hat Enterprise Linux 6 | 0:9.9p1-9.el9_8 | — |
| Red Hat | Red Hat Enterprise Linux 6 | 10.3p1-6.hum1 | — |
| Red Hat | Red Hat Enterprise Linux 7 | 0:9.9p1-25.el10_2 | unaffected |
| Red Hat | Red Hat Enterprise Linux 7 | 0:9.9p1-9.el9_8 | — |
| Red Hat | Red Hat Enterprise Linux 7 | 10.3p1-6.hum1 | — |
| Red Hat | Red Hat Enterprise Linux 8 | 0:9.9p1-25.el10_2 | unaffected |
| Red Hat | Red Hat Enterprise Linux 8 | 0:9.9p1-9.el9_8 | — |
| Red Hat | Red Hat Enterprise Linux 8 | 10.3p1-6.hum1 | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | 0:9.9p1-25.el10_2 | unaffected |
| Red Hat | Red Hat OpenShift Container Platform 4 | 0:9.9p1-9.el9_8 | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | 10.3p1-6.hum1 | — |