CVE-2026-109092 · Infrastructure
NO FIX YET · SEE WHAT TO DO
XWayland and the X Server mishandle negative sizes in ProcXvShmPutImage requests. A local client that is already authenticated to the X server can crash it or execute code.
first public Nov 13, 2026 · 1 source
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Systems running XWayland before 24.1.15 or X Server before 21.1.26. The attacker must be a local client that is already authenticated to the X server, so exposure is limited to multi-user or shared desktop machines. Machines with no X server or XWayland installed can skip it.
Not affected if no-x-server, single-user-machine, wayland-only-no-xwayland
Who cares desktop, linux, xorg, xwayland
Xwayland -version, and the X Server version with Xorg -version.24.1.15 and X Server before 21.1.26 are affected.24.1.15 or later.21.1.26 or later.Incorrectly handled negative sizes when processing ProcXvShmPutImage requests in the X.Org xwayland before 24.1.15 and X Server before 21.1.26 could be used by local authenticated X clients to crash the X server or execute code.
This page as .md · .json · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.
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