RHSA-2026:50100: Important: xorg-x11-server-Xwayland security update
Important: xorg-x11-server-Xwayland security update
Other sources
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) X.org: xorg-x11-server: GLX contextTags Use-After-Free in CommonMakeCurrent() (CVE-2026-56000) 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.
— Red Hat
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
xorg-x11-serverto a version that resolves this vulnerability.Patch CVE-2026-56000 - Upgrade
Upgrade
xorg-x11-server-Xwaylandto a version that resolves this vulnerability.Patch CVE-2026-55999
Event History
Frequently Asked Questions
What is the severity of RHSA-2026:50100?
The severity of RHSA-2026:50100 is rated as high with a score of 7.
What vulnerabilities are addressed in RHSA-2026:50100?
RHSA-2026:50100 addresses a buffer overflow and a use-after-free vulnerability in the xorg-x11-server-Xwayland package.
How do I fix RHSA-2026:50100?
Fix RHSA-2026:50100 by applying the latest security update for the xorg-x11-server-Xwayland package provided by Red Hat.
What systems are affected by RHSA-2026:50100?
RHSA-2026:50100 affects Red Hat Enterprise Linux for Power, x86_64, ARM 64, and IBM z Systems.
Is there an alternative to xorg-x11-server-Xwayland due to RHSA-2026:50100?
While there is no direct alternative, ensuring the update for xorg-x11-server-Xwayland is applied will mitigate the vulnerabilities.