Vulnerability in x.org xorg-x11-server

[ Description ]Official description

A heap buffer overflow caused by mismatched size usage in CopyArea CPU-to-FBO path in X.Org X Server before 21.1.15 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in the X server context.

[ 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/ad26c26bf795e6464f74c8ef5bb1d41403d877ab