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CVE-2026-25953
CRITICAL9.8
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.
CVE Details
CVSS v3.1 Score9.8
SeverityCRITICAL
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack VectorNETWORK
ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
Published2/25/2026
Last Modified2/27/2026
Sourcenvd
Honeypot Sightings0
Affected Products
freerdp:freerdp
Weaknesses (CWE)
CWE-416
References
https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_rail.c#L1230-L1237(security-advisories@github.com)
https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_rail.c#L257-L290(security-advisories@github.com)
https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_rail.c#L643-L647(security-advisories@github.com)
https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c#L1394-L1428(security-advisories@github.com)
https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c#L1462-L1470(security-advisories@github.com)
https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c#L1484-L1491(security-advisories@github.com)
https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/libfreerdp/gdi/gfx.c#L254-L286(security-advisories@github.com)
https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/libfreerdp/gdi/gfx.c#L278-L279(security-advisories@github.com)
https://github.com/FreeRDP/FreeRDP/commit/1994e9844212a6dfe0ff12309fef520e888986b5(security-advisories@github.com)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-p6rq-rxpc-rh3p(security-advisories@github.com)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-p6rq-rxpc-rh3p(134c704f-9b21-4f2e-91b3-4a467353bcc0)
IOC Correlations
No correlations recorded
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