RLSA-2026:99865: Moderate: 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 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
rocky-linux/xorg-x11-server-commonto a version that resolves this vulnerability.Fixed in 0:1.20.11-28.el8_10.6 - Upgrade
Upgrade
rocky-linux/xorg-x11-server-debuginfoto a version that resolves this vulnerability.Fixed in 0:1.20.11-28.el8_10.6 - Upgrade
Upgrade
rocky-linux/xorg-x11-server-debugsourceto a version that resolves this vulnerability.Fixed in 0:1.20.11-28.el8_10.6 - Upgrade
Upgrade
rocky-linux/xorg-x11-server-develto a version that resolves this vulnerability.Fixed in 0:1.20.11-28.el8_10.6 - Upgrade
Upgrade
rocky-linux/xorg-x11-server-Xdmxto a version that resolves this vulnerability.Fixed in 0:1.20.11-28.el8_10.6 - Upgrade
Upgrade
rocky-linux/xorg-x11-server-Xdmx-debuginfoto a version that resolves this vulnerability.Fixed in 0:1.20.11-28.el8_10.6 - Upgrade
Upgrade
rocky-linux/xorg-x11-server-Xephyrto a version that resolves this vulnerability.Fixed in 0:1.20.11-28.el8_10.6 - Upgrade
Upgrade
rocky-linux/xorg-x11-server-Xephyr-debuginfoto a version that resolves this vulnerability.Fixed in 0:1.20.11-28.el8_10.6 - Upgrade
Upgrade
rocky-linux/xorg-x11-server-Xnestto a version that resolves this vulnerability.Fixed in 0:1.20.11-28.el8_10.6 - Upgrade
Upgrade
rocky-linux/xorg-x11-server-Xnest-debuginfoto a version that resolves this vulnerability.Fixed in 0:1.20.11-28.el8_10.6 - Upgrade
Upgrade
rocky-linux/xorg-x11-server-Xorgto a version that resolves this vulnerability.Fixed in 0:1.20.11-28.el8_10.6 - Upgrade
Upgrade
rocky-linux/xorg-x11-server-Xorg-debuginfoto a version that resolves this vulnerability.Fixed in 0:1.20.11-28.el8_10.6 - Upgrade
Upgrade
rocky-linux/xorg-x11-server-Xvfbto a version that resolves this vulnerability.Fixed in 0:1.20.11-28.el8_10.6 - Upgrade
Upgrade
rocky-linux/xorg-x11-server-Xvfb-debuginfoto a version that resolves this vulnerability.Fixed in 0:1.20.11-28.el8_10.6 - Upgrade
Upgrade
rocky-linux/xorg-x11-server-sourceto a version that resolves this vulnerability.Fixed in 0:1.20.11-28.el8_10.6
Event History
Frequently Asked Questions
What level of access does an attacker need to exploit this issue?
The CVSS vector indicates that exploitation requires local access and low privileges. No user interaction is required.
What is the potential impact if exploitation succeeds?
The issue is described as an out-of-bounds write in XKB keycode handling that can lead to arbitrary code execution. The CVSS vector rates confidentiality, integrity, and availability impact as high.
Which Rocky Linux packages are identified in this update?
The listed packages are xorg-x11-server-common, xorg-x11-server-devel, xorg-x11-server-xdmx, and xorg-x11-server-xephyr, along with their listed debuginfo and debugsource packages.