CVE-2026-25955 FreeRDP has heap-use-after-free in xf_AppUpdateWindowFromSurface (stale XImage)

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, xfAppUpdateWindowFromSurface reuses a cached XImage whose data pointer references a freed RDPGFX surface buffer, because gdiDeleteSurface frees surface-data without invalidating the appWindow-image that...

CVE-2026-25955

CVE-2026-25955 is a vulnerability in FreeRDP (prior to 3.23.0) where the function xf_AppUpdateWindowFromSurface reuses a cached XImage that points to freed memory in an RDPGFX surface buffer. The root cause is that gdi_DeleteSurface frees surface->data without invalidating the aliasing appWind...