Issued at: 2026-07-14
Updated at: 2026-07-14
Synopsis
Important: xorg-x11-server security update
Description
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: 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 x86_64 - AppStream
xorg-x11-server-0:1.20.11-28.el8_10.3.src.rpm
xorg-x11-server-common-0:1.20.11-28.el8_10.3.x86_64.rpm
xorg-x11-server-debuginfo-0:1.20.11-28.el8_10.3.x86_64.rpm
xorg-x11-server-debugsource-0:1.20.11-28.el8_10.3.x86_64.rpm
xorg-x11-server-Xdmx-0:1.20.11-28.el8_10.3.x86_64.rpm
xorg-x11-server-Xdmx-debuginfo-0:1.20.11-28.el8_10.3.x86_64.rpm
xorg-x11-server-Xephyr-0:1.20.11-28.el8_10.3.x86_64.rpm
xorg-x11-server-Xephyr-debuginfo-0:1.20.11-28.el8_10.3.x86_64.rpm
xorg-x11-server-Xnest-0:1.20.11-28.el8_10.3.x86_64.rpm
xorg-x11-server-Xnest-debuginfo-0:1.20.11-28.el8_10.3.x86_64.rpm
xorg-x11-server-Xorg-0:1.20.11-28.el8_10.3.x86_64.rpm
xorg-x11-server-Xorg-debuginfo-0:1.20.11-28.el8_10.3.x86_64.rpm
xorg-x11-server-Xvfb-0:1.20.11-28.el8_10.3.x86_64.rpm
xorg-x11-server-Xvfb-debuginfo-0:1.20.11-28.el8_10.3.x86_64.rpm
Rocky Linux 8 aarch64 - AppStream
xorg-x11-server-0:1.20.11-28.el8_10.3.src.rpm
xorg-x11-server-common-0:1.20.11-28.el8_10.3.aarch64.rpm
xorg-x11-server-debuginfo-0:1.20.11-28.el8_10.3.aarch64.rpm
xorg-x11-server-debugsource-0:1.20.11-28.el8_10.3.aarch64.rpm
xorg-x11-server-Xdmx-0:1.20.11-28.el8_10.3.aarch64.rpm
xorg-x11-server-Xdmx-debuginfo-0:1.20.11-28.el8_10.3.aarch64.rpm
xorg-x11-server-Xephyr-0:1.20.11-28.el8_10.3.aarch64.rpm
xorg-x11-server-Xephyr-debuginfo-0:1.20.11-28.el8_10.3.aarch64.rpm
xorg-x11-server-Xnest-0:1.20.11-28.el8_10.3.aarch64.rpm
xorg-x11-server-Xnest-debuginfo-0:1.20.11-28.el8_10.3.aarch64.rpm
xorg-x11-server-Xorg-0:1.20.11-28.el8_10.3.aarch64.rpm
xorg-x11-server-Xorg-debuginfo-0:1.20.11-28.el8_10.3.aarch64.rpm
xorg-x11-server-Xvfb-0:1.20.11-28.el8_10.3.aarch64.rpm
xorg-x11-server-Xvfb-debuginfo-0:1.20.11-28.el8_10.3.aarch64.rpm
Rocky Linux 8 x86_64 - PowerTools
xorg-x11-server-debugsource-0:1.20.11-28.el8_10.3.i686.rpm
xorg-x11-server-devel-0:1.20.11-28.el8_10.3.i686.rpm
xorg-x11-server-devel-0:1.20.11-28.el8_10.3.x86_64.rpm
xorg-x11-server-source-0:1.20.11-28.el8_10.3.noarch.rpm
Rocky Linux 8 aarch64 - PowerTools
xorg-x11-server-devel-0:1.20.11-28.el8_10.3.aarch64.rpm
xorg-x11-server-source-0:1.20.11-28.el8_10.3.noarch.rpm