RHSA-2026:99122: 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
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redhat/xorg-x11-serverto a version that resolves this vulnerability.Fixed in 1.20.11-34.el9_8.6 - Upgrade
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redhat/xorg-x11-server-commonto a version that resolves this vulnerability.Fixed in 1.20.11-34.el9_8.6 - Upgrade
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redhat/xorg-x11-server-debuginfoto a version that resolves this vulnerability.Fixed in 1.20.11-34.el9_8.6 - Upgrade
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redhat/xorg-x11-server-debugsourceto a version that resolves this vulnerability.Fixed in 1.20.11-34.el9_8.6 - Upgrade
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redhat/xorg-x11-server-commonto a version that resolves this vulnerability.Fixed in 1.20.11-34.el9_8.6.aa - Upgrade
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redhat/xorg-x11-server-debuginfoto a version that resolves this vulnerability.Fixed in 1.20.11-34.el9_8.6.aa - Upgrade
Upgrade
redhat/xorg-x11-server-debugsourceto a version that resolves this vulnerability.Fixed in 1.20.11-34.el9_8.6.aa - Upgrade
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redhat/xorg-x11-server-develto a version that resolves this vulnerability.Fixed in 1.20.11-34.el9_8.6 - Upgrade
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redhat/xorg-x11-server-sourceto a version that resolves this vulnerability.Fixed in 1.20.11-34.el9_8.6 - Upgrade
Upgrade
redhat/xorg-x11-server-develto a version that resolves this vulnerability.Fixed in 1.20.11-34.el9_8.6.aa
Event History
Frequently Asked Questions
Which installed packages should be checked when assessing exposure?
The advisory lists xorg-x11-server as well as xorg-x11-server-common, -debuginfo, -debugsource, -devel, and -source packages. The affected component is the X.Org server's XKB keycode handling.
What is the potential impact of exploitation?
The listed flaw is an out-of-bounds write in XKB keycode handling that can lead to arbitrary code execution.