MEDIUM 4.3 Microsoft
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
Microsoft Security Update 2026-Jun: 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
Affected Products
- azl3 openssh 9.8p1-6 on Azure Linux 3.0
- azl3 openssh 9.8p1-8 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55653
- https://nvd.nist.gov/vuln/detail/CVE-2026-55653
This medium severity vulnerability with a CVSS score of 4.3 was published on 2026-06-09 via Microsoft. Affected: azl3 openssh 9.8p1-6 on Azure Linux 3.0, azl3 openssh 9.8p1-8 on Azure Linux 3.0.
vulnfeed aggregates 9166 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.