Vulnerability in x.org xorg-x11-server

[ Description ]Official description

An integer truncation issue in XkbResizeKeyType() that could lead to a heap buffer overflow by authenticated X clients in X.org X server before 21.1.25 and XWayland before 24.1.14 could be exploited for crashes or potential code execution in the X server.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund6 Oct 2026WID-SEC-2026-3787

  X.Org X11 and Xwayland: Multiple vulnerabilities Translated from German

  Risk mediumCVE-2026-93517CVE-2026-93522CVE-2026-93520+9 more CVEs

[ References ]References

• gitlab.freedesktop.org/xorg/xserver/-/commit/89101a6c6618f543d7502f2077c7ef1a507af256