{"id":"ALSA-2026:91365","summary":"Important: libX11 security update","details":"The libX11 packages contain the core X11 protocol client library.  \n\nSecurity Fix(es):  \n\n  * libX11: libX11: Heap-based buffer overflow via malicious X server (CVE-2026-88806)\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":"2026-10-29T22:45:02.304041255Z","published":"2026-10-27T00:00:00Z","related":["CVE-2026-88806"],"upstream":["CVE-2026-88806"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:91365"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-88806"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2538514"},{"type":"ADVISORY","url":"https://errata.almalinux.org/9/ALSA-2026-91365.html"}],"affected":[{"package":{"name":"libX11","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/libX11"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.12-1.el9_8.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:91365.json"}},{"package":{"name":"libX11-common","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/libX11-common"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.12-1.el9_8.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:91365.json"}},{"package":{"name":"libX11-devel","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/libX11-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.12-1.el9_8.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:91365.json"}},{"package":{"name":"libX11-xcb","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/libX11-xcb"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.12-1.el9_8.1"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:91365.json"}}],"schema_version":"1.9.2"}