{"id":"ALSA-2026:47755","summary":"Moderate: openssh security update","details":"OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary for both the OpenSSH client and server.  \n\nSecurity Fix(es):  \n\n  * openssh: Local MITM of X11 forwarding via abstract UNIX socket pre-binding in AlmaLinux OpenSSH client versions (CVE-2026-55655)\n  * openssh: Double free in AlmaLinux versions of OpenSSH DH-GEX client path during FIPS known-group validation leads to client-side denial of service (CVE-2026-55653)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","modified":"2026-07-30T18:29:46.993844926Z","published":"2026-07-29T00:00:00Z","related":["CVE-2026-55653","CVE-2026-55655"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:47755"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-55653"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-55655"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2462250"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2462351"},{"type":"ADVISORY","url":"https://errata.almalinux.org/8/ALSA-2026-47755.html"}],"affected":[{"package":{"name":"openssh","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/openssh"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.0p1-30.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:47755.json"}},{"package":{"name":"openssh-askpass","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/openssh-askpass"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.0p1-30.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:47755.json"}},{"package":{"name":"openssh-cavs","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/openssh-cavs"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.0p1-30.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:47755.json"}},{"package":{"name":"openssh-clients","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/openssh-clients"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.0p1-30.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:47755.json"}},{"package":{"name":"openssh-keycat","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/openssh-keycat"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.0p1-30.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:47755.json"}},{"package":{"name":"openssh-ldap","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/openssh-ldap"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.0p1-30.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:47755.json"}},{"package":{"name":"openssh-server","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/openssh-server"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.0p1-30.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:47755.json"}},{"package":{"name":"pam_ssh_agent_auth","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/pam_ssh_agent_auth"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.10.3-7.30.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:47755.json"}}],"schema_version":"1.7.5"}