xwayland

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• Critical 9.0
  CVE-2026-56000

  xorg-x11-server / xwayland GLX contextTags Use-After-Free in CommonMakeCurrent()

  Local attackers with a X connection able to provide GLX commit to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a Heap Use After Free, due to CommonMakeCurrent() pointing into potentially reallocated memory.

  X.Org xwayland xorg-x11-server xorg-server Debian Ubuntu Azure Linux Alpine Wolfi
  Jul 8, 2026
• Critical 9.8
  CVE-2023-6816

  Xorg-x11-server: heap buffer overflow in devicefocusevent and procxiquerypointer

  A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the X.Org Server was only allocating space for the device'…

  Red Hat Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 7 Linux Debian Ubuntu Azure Linux Alpine Wolfi
  Jan 18, 2024