ALSA-2026:89747: Important: xorg-x11-server security update
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.
Security Fix(es):
xorg-x11-server: xorg-x11-server: Arbitrary code execution via use-after-free in passive grab handling (CVE-2026-93516) xorg-x11-server: xorg-x11-server: Privilege escalation via crafted RandR provider property requests (CVE-2026-93521) xorg-x11-server: xwayland: xorg-x11-server: Arbitrary code execution via double-free in XKB geometry handling (CVE-2026-88812) xorg-x11-server: xorg-x11-server: Out-of-bounds write via unvalidated modifier in ProcXIPassiveUngrabDevice (CVE-2026-93523) xorg-x11-server: xorg-x11-server: arbitrary code execution via GLX RenderLarge heap-based buffer overflow (CVE-2026-93517) xorg-x11-server: xorg-x11-server: arbitrary code execution via integer truncation during keyboard mapping resize (CVE-2026-93518) xorg-x11-server: xorg-x11-server: Arbitrary code execution via buffer overflow in inputconstraincursor() (CVE-2026-93519) xorg-x11-server: xorg-x11-server: arbitrary code execution via out-of-bounds write in XKB keycode handling (CVE-2026-93520)
For 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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
almalinux/xorg-x11-server-Xdmxto a version that resolves this vulnerability.Fixed in 1.20.11-28.el8_10.5 - Upgrade
Upgrade
almalinux/xorg-x11-server-Xephyrto a version that resolves this vulnerability.Fixed in 1.20.11-28.el8_10.5 - Upgrade
Upgrade
almalinux/xorg-x11-server-Xnestto a version that resolves this vulnerability.Fixed in 1.20.11-28.el8_10.5 - Upgrade
Upgrade
almalinux/xorg-x11-server-Xorgto a version that resolves this vulnerability.Fixed in 1.20.11-28.el8_10.5 - Upgrade
Upgrade
almalinux/xorg-x11-server-Xvfbto a version that resolves this vulnerability.Fixed in 1.20.11-28.el8_10.5 - Upgrade
Upgrade
almalinux/xorg-x11-server-commonto a version that resolves this vulnerability.Fixed in 1.20.11-28.el8_10.5 - Upgrade
Upgrade
almalinux/xorg-x11-server-develto a version that resolves this vulnerability.Fixed in 1.20.11-28.el8_10.5 - Upgrade
Upgrade
almalinux/xorg-x11-server-sourceto a version that resolves this vulnerability.Fixed in 1.20.11-28.el8_10.5
Event History
Child vulnerabilities
Contains the following vulnerabilities.