CVE-2026-55654
Low
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.
SeverityLow
CVSS3.7
Exploit probability—
Product
Openbsd Openssh
PublishedJun 23, 2026
First seenJun 23, 2026
Weakness typeCWE-125Out-of-bounds read
How to fix
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openbsd openssh | No range specified | — |
| redhat hardened_images | No range specified | — |
| redhat enterprise_linux | 6.0, 7.0, 8.0, 9.0, 10.0 | — |
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