CVE-2026-55653: Openssh: double free in red hat enterprise linux versions of openssh dh-gex client path during fips known-group validation leads to client-side denial of service
Overview
- Severity
- Medium (CVSS 4.3)
- CVSS Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- Exploit Status
- Not Exploited
- Patch Tuesday
- 2026-Jun
- Released
- 2026-06-27
- Last Updated
- 2026-06-28
- EPSS Score
- 0.28% (percentile: 20.6%)
Affected Products (2)
Open Source Software
- azl3 openssh 9.8p1-6 on Azure Linux 3.0
- azl3 openssh 9.8p1-8 on Azure Linux 3.0
Revision History
- 2026-06-27: Information published.
- 2026-06-28: Information published.