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Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, `xf_AppUpdateWindowFromSurface` reuses a cached `XImage` whose `data` pointer references a freed RDPGFX surface buffer, because `gdi_DeleteSurface` frees `surface->data` without invalidating the `appWindow->image` that aliases it. Version 3.23.0 fixes the issue.

PUBLISHED Reserved 2026-02-09 | Published 2026-02-25 | Updated 2026-02-26 | Assigner GitHub_M




MEDIUM: 5.5CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

Problem types

CWE-416: Use After Free

Product status

< 3.23.0
affected

References

github.com/...reeRDP/security/advisories/GHSA-4g54-x8v7-559x exploit

github.com/...reeRDP/security/advisories/GHSA-4g54-x8v7-559x

github.com/...ommit/169d358734509e82663a0d6a0085ae726d439d8e

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

cve.org (CVE-2026-25955)

nvd.nist.gov (CVE-2026-25955)

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