RLSA-2026:19343

RLSA-2026:19343 · Important: xorg-x11-server security update

This page contains facts from public vulnerability sources. Check the original advisory before updating.

X.Org is an open-source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon. Security Fix(es): * xorg: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map handling (CVE-2026-33999) * xorg: xwayland: X.Org X server: Use-after-free vulnerability leads to server crash and potential memory corruption (CVE-2026-34001) * xorg: xwayland: X.Org X server: Information exposure and denial of service via out-of-bounds memory access (CVE-2026-34003) 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.

CVSS 7.8 · High · Fix available

Published

2026-05-28T15:43:06.024531Z

Updated

2026-05-28T16:00:26.711295264Z

Stack: system

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