PatchTheCVECVE-2026-55654: A flaw was found in OpenSSH
CVE-2026-55654 is a low-severity flaw (CVSS 3.7) affecting openssh, hardened images, enterprise linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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 lea
Why this priority
- Public exploit reference
- Remotely exploitable, no login, no user action
- On your watchlist
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 3.7 (Low) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.7% (top 49%) |
| CISA exploited list | No |
| Weakness | CWE-125 |
| Published | 2026-06-23 |
| Last modified | 2026-09-24 |
Last updated 2026-09-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Advisories and coverage
Official advisories
- AlmaLinux Errata: [ALSA-2026:47756] Important: openssh security update 2026-07-31
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-55654?
openssh: mitigate or apply the listed mitigation; hardened images: mitigate or apply the listed mitigation; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2026-55654 being exploited?
CVE-2026-55654 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-55654 affect?
CVE-2026-55654 affects openssh, hardened images, enterprise linux. Severity is low (CVSS 3.7). 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-
How urgent is CVE-2026-55654?
Priority 41/100. Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist
Software pages
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