RHSA-2026:52398 — Security Advisory
Red Hat Security Advisory: xorg-x11-server-Xwayland security update
Severity
ImportantRed Hat Product Security
Products
Official CSAF product identity
Published · August 10, 2026
Updated · August 12, 2026
Topic
An update for xorg-x11-server-Xwayland is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
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.