RHSA-2026:52398: 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
Event History
Frequently Asked Questions
What is the severity of RHSA-2026:52398?
The severity of RHSA-2026:52398 is classified as high, with a score of 7.
What vulnerabilities are addressed in RHSA-2026:52398?
RHSA-2026:52398 addresses a heap buffer overflow and a use-after-free vulnerability in the Xwayland server.
How do I fix RHSA-2026:52398?
To fix RHSA-2026:52398, you should update the xorg-x11-server-Xwayland package to the latest version provided by Red Hat.
What systems are affected by RHSA-2026:52398?
RHSA-2026:52398 affects various versions of Red Hat Enterprise Linux across x86_64, ARM 64, IBM z Systems, and Power architectures.
What are the potential risks of not addressing RHSA-2026:52398?
Not addressing RHSA-2026:52398 could lead to exploitation of the vulnerabilities, resulting in unauthorized access or system instability.