CVE-2026-109903 · Infrastructure
NO FIX YET · SEE WHAT TO DO
A negative integer cast to CARD32 in XvQueryImageAttributes causes a buffer overread in X.Org X Server before 21.1.26 and Xwayland before 24.1.15. An authenticated X client can use it to crash the server.
first public Nov 13, 2026 · 1 source
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Systems running X.Org X Server before 21.1.26 or Xwayland before 24.1.15 are exposed. The flaw needs an authenticated X client, so hosts where only trusted local users have X access carry less risk. Desktop and Linux workstation fleets are the main places to look.
Not affected if no-x-clients, wayland-only
Who cares desktop, linux, x.org, xwayland
Xorg -version or X -version and compare against 21.1.26.Xwayland -version and compare against 24.1.15.21.1.26 or later.24.1.15 or later.A buffer overread caused by casting a negative integer to CARD32 in XvQueryImageAttributes in X.Org X Server before 21.1.26 and xwayland before 24.1.15 could be used to causes crashes by authenticated X clients.
This page as .md · .json · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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