RHSA-2026:52397: 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) 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-2026:52397?
The severity of RHSA-2026:52397 is high with a CVSS score of 7.
How do I fix RHSA-2026:52397?
To fix RHSA-2026:52397, update the xorg-x11-server-Xwayland package to the latest version provided by Red Hat.
What vulnerability does RHSA-2026:52397 address?
RHSA-2026:52397 addresses a buffer overflow vulnerability related to the Glamor Font Atlas in Xwayland, identified as CVE-2026-55999.
What systems are affected by RHSA-2026:52397?
RHSA-2026:52397 affects various Red Hat Enterprise Linux systems including x86_64, ARM 64, and IBM z Systems.
Is there any additional information available about RHSA-2026:52397?
Additional information about RHSA-2026:52397, including specific security fixes, can be found in the official Red Hat errata.