CVE-2026-55654

Published Jun 23, 2026

Last updated a day ago

CVSS low 3.7

Overview

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.
Source
secalert@redhat.com
NVD status
Analyzed
Products
openssh, hardened_images, enterprise_linux

Risk scores

CVSS 3.1

Type
Secondary
Base score
3.7
Impact score
1.4
Exploitability score
2.2
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Severity
LOW

Weaknesses

secalert@redhat.com
CWE-125

Social media

Hype score
Not currently trending

  1. 🚨*CVE* 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 Inte… https://t.co/s8Z5VzgEcC ----- Traducción: Se encontró una fa… https://t.co/utmtN

    @infoflowcloud

    23 Jun 2026

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Configurations

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References

Sources include official advisories and independent security research.