{"id":"ALSA-2026:47757","summary":"Important: 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  * openssh: Heap out-of-bounds read in AlmaLinux versions of OpenSSH GSSAPI indicator cleanup due to missing NULL sentinel termination (CVE-2026-55654)\n  * openssh: OpenSSH: Use-after-free vulnerability during host key re-exchange on the client side (CVE-2026-60002)\n  * openssh: OpenSSH: `scp` file misplacement vulnerability during remote copy (CVE-2026-59996)\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":"2026-07-30T16:44:47.912923424Z","published":"2026-07-29T00:00:00Z","related":["CVE-2026-55653","CVE-2026-55654","CVE-2026-55655","CVE-2026-59996","CVE-2026-60002"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:47757"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-55653"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-55654"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-55655"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-59996"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-60002"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2462250"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2462351"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2462493"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2497936"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2497944"},{"type":"ADVISORY","url":"https://errata.almalinux.org/10/ALSA-2026-47757.html"}],"affected":[{"package":{"name":"openssh","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/openssh"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.9p1-25.el10_2.alma.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:47757.json"}},{"package":{"name":"openssh-askpass","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/openssh-askpass"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.9p1-25.el10_2.alma.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:47757.json"}},{"package":{"name":"openssh-clients","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/openssh-clients"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.9p1-25.el10_2.alma.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:47757.json"}},{"package":{"name":"openssh-keycat","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/openssh-keycat"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.9p1-25.el10_2.alma.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:47757.json"}},{"package":{"name":"openssh-keysign","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/openssh-keysign"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.9p1-25.el10_2.alma.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:47757.json"}},{"package":{"name":"openssh-server","ecosystem":"AlmaLinux:10","purl":"pkg:rpm/almalinux/openssh-server"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.9p1-25.el10_2.alma.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux10/ALSA-2026:47757.json"}}],"schema_version":"1.7.5"}