{"id":"AZL-91200","summary":"CVE-2026-55653 affecting package openssh 9.8p1-9","details":"A flaw was found in OpenSSH. A malicious SSH server can exploit a double free vulnerability in the Diffie-Hellman Group Exchange (DH-GEX) client path. This occurs during FIPS (Federal Information Processing Standards) mode known-group validation when the client processes attacker-controlled DH-GEX group parameters. Successful exploitation leads to client-side process termination, resulting in a Denial of Service (DoS).","modified":"2026-08-30T05:26:50Z","published":"2026-06-23T04:17:36Z","upstream":["CVE-2026-55653"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55653"}],"affected":[{"package":{"name":"openssh","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/openssh"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"9.8p1-9"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-91200.json"}}],"schema_version":"1.9.0"}