RHSA-2026:50718: 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
xorgto a version that resolves this vulnerability.Patch CVE-2026-55999
Event History
Frequently Asked Questions
What is the severity of RHSA-2026:50718?
The severity of RHSA-2026:50718 is high with a score of 7.
What vulnerabilities are addressed in RHSA-2026:50718?
RHSA-2026:50718 addresses vulnerabilities including a heap buffer overflow and a use-after-free issue in xorg-x11-server-Xwayland.
How do I fix RHSA-2026:50718?
To fix RHSA-2026:50718, you should update the xorg-x11-server-Xwayland package to the latest version provided by Red Hat.
Who is affected by the vulnerabilities in RHSA-2026:50718?
Organizations using Red Hat Enterprise Linux and related distributions are affected by the vulnerabilities in RHSA-2026:50718.
What is Xwayland in the context of RHSA-2026:50718?
Xwayland is an X server that allows X clients to run under the Wayland display server protocol, and it is the component being updated in RHSA-2026:50718.