[ALSA-2026:86907] Important: xorg-x11-server-Xwayland security update
Type:
security
Severity:
important
Release date:
2026-10-21
Description:
Xwayland is an X server for running X clients under Wayland. 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 input_constrain_cursor() (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.
Updated packages listed below:
Architecture Package Checksum
aarch64 xorg-x11-server-Xwayland-21.1.3-20.el8_10.4.aarch64.rpm 304cf82caecde269b1fcc71295d012086f046a0c363b39b62c979dd3e0e4c02f
ppc64le xorg-x11-server-Xwayland-21.1.3-20.el8_10.4.ppc64le.rpm 4f0d6ecbf882cc6f34d9afcbb375929378f4425e7280b5e8bfc4ec9ce11926a9
s390x xorg-x11-server-Xwayland-21.1.3-20.el8_10.4.s390x.rpm 2088e1d954b34f402af21e451fff2389be662078a234b115102e18083f357d56
x86_64 xorg-x11-server-Xwayland-21.1.3-20.el8_10.4.x86_64.rpm 2e98f43ae351061e56e759b860c9ea94716355f6228f12d4fed9493377b89786
Notes:
This page is generated automatically from Red Hat security data and has not been checked for errors. For clarification or corrections please contact the AlmaLinux Packaging Team.