RLSA-2026:11656

Synopsis

Important: xorg-x11-server-Xwayland security update

Description

Xwayland is an X server for running X clients under Wayland.

Security Fix(es):

* xorg: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map handling (CVE-2026-33999)

* xorg: xwayland: X.Org X server: Use-after-free vulnerability leads to server crash and potential memory corruption (CVE-2026-34001)

* xorg: xwayland: X.Org X server: Information exposure and denial of service via out-of-bounds memory access (CVE-2026-34003)

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 products

Rocky Linux 8 aarch64 Rocky Linux 8 x86_64

Fixes

2451106 2451109 2451113

CVEs

CVE-2026-33999 CVE-2026-34001 CVE-2026-34003

Affected packages

Rocky Linux 8 aarch64 - AppStream

xorg-x11-server-Xwayland-0:21.1.3-20.el8_10.aarch64.rpm xorg-x11-server-Xwayland-0:21.1.3-20.el8_10.src.rpm xorg-x11-server-Xwayland-debuginfo-0:21.1.3-20.el8_10.aarch64.rpm xorg-x11-server-Xwayland-debugsource-0:21.1.3-20.el8_10.aarch64.rpm

Rocky Linux 8 x86_64 - AppStream

xorg-x11-server-Xwayland-0:21.1.3-20.el8_10.src.rpm xorg-x11-server-Xwayland-0:21.1.3-20.el8_10.x86_64.rpm xorg-x11-server-Xwayland-debuginfo-0:21.1.3-20.el8_10.x86_64.rpm xorg-x11-server-Xwayland-debugsource-0:21.1.3-20.el8_10.x86_64.rpm