CVE-2026-25953

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `xf_AppUpdateWindowFromSurface` reads from a freed `xfAppWindow` because the RDPGFX DVC thread obtains a bare pointer via `xf_rail_get_window` without any lifetime protection, while the main thread can concurrently delete the window through a fastpath window-delete order. Version 3.23.0 fixes the issue.

PUBLISHED Reserved 2026-02-09 | Published 2026-02-25 | Updated 2026-02-25 | Assigner GitHub_M

Problem types

CWE-416: Use After Free

Product status

References

github.com/...reeRDP/security/advisories/GHSA-p6rq-rxpc-rh3p

github.com/...ommit/1994e9844212a6dfe0ff12309fef520e888986b5

github.com/...2b4806c2a5c583ca39dd9ef1e/client/X11/xf_rail.c

github.com/...2b4806c2a5c583ca39dd9ef1e/client/X11/xf_rail.c

github.com/...2b4806c2a5c583ca39dd9ef1e/client/X11/xf_rail.c

github.com/...4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c

github.com/...4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c

github.com/...4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c

github.com/...2b4806c2a5c583ca39dd9ef1e/libfreerdp/gdi/gfx.c

github.com/...2b4806c2a5c583ca39dd9ef1e/libfreerdp/gdi/gfx.c

cve.org (CVE-2026-25953)

nvd.nist.gov (CVE-2026-25953)

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