{"id":"ALSA-2026:84574","summary":"Important: xorg-x11-server security update","details":"X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon.  \n\nSecurity Fix(es):  \n\n  * xorg-x11-server: xorg-x11-server: Arbitrary code execution via use-after-free in passive grab handling (CVE-2026-93516)\n  * xorg-x11-server: xorg-x11-server: arbitrary code execution via GLX RenderLarge heap-based buffer overflow (CVE-2026-93517)\n  * xorg-x11-server: xorg-x11-server: arbitrary code execution via integer truncation during keyboard mapping resize (CVE-2026-93518)\n  * xorg-x11-server: xorg-x11-server: Arbitrary code execution via buffer overflow in input_constrain_cursor() (CVE-2026-93519)\n  * xorg-x11-server: xorg-x11-server: arbitrary code execution via out-of-bounds write in XKB keycode handling (CVE-2026-93520)\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":"2026-10-20T14:45:02.355970363Z","published":"2026-10-19T00:00:00Z","related":["CVE-2026-93516","CVE-2026-93517","CVE-2026-93518","CVE-2026-93519","CVE-2026-93520"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:84574"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-93516"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-93517"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-93518"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-93519"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-93520"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2545161"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2545246"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2545860"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2545887"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2545908"},{"type":"ADVISORY","url":"https://errata.almalinux.org/9/ALSA-2026-84574.html"}],"affected":[{"package":{"name":"xorg-x11-server-Xdmx","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/xorg-x11-server-Xdmx"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.20.11-34.el9_8.5"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:84574.json"}},{"package":{"name":"xorg-x11-server-Xephyr","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/xorg-x11-server-Xephyr"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.20.11-34.el9_8.5"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:84574.json"}},{"package":{"name":"xorg-x11-server-Xnest","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/xorg-x11-server-Xnest"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.20.11-34.el9_8.5"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:84574.json"}},{"package":{"name":"xorg-x11-server-Xorg","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/xorg-x11-server-Xorg"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.20.11-34.el9_8.5"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:84574.json"}},{"package":{"name":"xorg-x11-server-Xvfb","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/xorg-x11-server-Xvfb"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.20.11-34.el9_8.5"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:84574.json"}},{"package":{"name":"xorg-x11-server-common","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/xorg-x11-server-common"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.20.11-34.el9_8.5"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:84574.json"}},{"package":{"name":"xorg-x11-server-devel","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/xorg-x11-server-devel"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.20.11-34.el9_8.5"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:84574.json"}},{"package":{"name":"xorg-x11-server-source","ecosystem":"AlmaLinux:9","purl":"pkg:rpm/almalinux/xorg-x11-server-source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.20.11-34.el9_8.5"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux9/ALSA-2026:84574.json"}}],"schema_version":"1.9.0"}