Issued at: 2026-07-14
Updated at: 2026-07-14
Synopsis
Important: xorg-x11-server-Xwayland security update
Description
Xwayland is an X server for running X clients under Wayland.
Security Fix(es):
* xorg: X11: xserver: X.org: glamor Font Atlas Heap Buffer Overflow (CVE-2026-55999)
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
2496165
CVEs
CVE-2026-55999
Affected packages
Rocky Linux 8 aarch64 - AppStream
xorg-x11-server-Xwayland-0:21.1.3-20.el8_10.3.aarch64.rpm
xorg-x11-server-Xwayland-0:21.1.3-20.el8_10.3.src.rpm
xorg-x11-server-Xwayland-debuginfo-0:21.1.3-20.el8_10.3.aarch64.rpm
xorg-x11-server-Xwayland-debugsource-0:21.1.3-20.el8_10.3.aarch64.rpm
Rocky Linux 8 x86_64 - AppStream
xorg-x11-server-Xwayland-0:21.1.3-20.el8_10.3.src.rpm
xorg-x11-server-Xwayland-0:21.1.3-20.el8_10.3.x86_64.rpm
xorg-x11-server-Xwayland-debuginfo-0:21.1.3-20.el8_10.3.x86_64.rpm
xorg-x11-server-Xwayland-debugsource-0:21.1.3-20.el8_10.3.x86_64.rpm