Out-of-bounds Read in Openbsd Openssh
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…
Vulnerability class: Buffer Overflow
EPSS: 0.004 (31.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Openbsd Openssh
- Red Hat Enterprise Linux 10 — versions 0:9.9p1-25.el10_2
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9 — versions 0:9.9p1-9.el9_8
- Red Hat Hardened Images — versions 10.3p1-6.hum1
- Red Hat Openshift Container Platform 4
- Redhat Enterprise_linux — versions 6.0, 7.0, 8.0
- Redhat Hardened_images
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Exploit, Issue Tracking, Vendor Advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
Frequently asked questions
- What is CVE-2026-55654?
- CVE-2026-55654 is a low-severity vulnerability in Openbsd Openssh, classified under Out-of-bounds Read. CVSS score: 3.7/10. Published 2026-06-23.
- How severe is CVE-2026-55654?
- Low severity. CVSS v3 base score is 3.7 out of 10.