CVE-2026-25955 - Vulnerability Analysis

Overview

FreeRDP < 3.23.0 contains a use-after-free vulnerability caused by reuse of a cached XImage referencing a freed RDPGFX surface buffer in xf_AppUpdateWindowFromSurface, letting attackers cause memory corruption, exploit requires crafted RDP session.

Severity & Score

Impact

Attackers can cause memory corruption leading to potential remote code execution or denial of service.

Mitigation

Upgrade to version 3.23.0 or later.

References

• https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c#L1484-L1492
• https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c#L1494-L1500
• https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/client/X11/xf_window.c#L1528
• https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1e/libfreerdp/gdi/gfx.c#L1224-L1227
• https://github.com/FreeRDP/FreeRDP/commit/169d358734509e82663a0d6a0085ae726d439d8e
• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4g54-x8v7-559x

Social Media Activity(1 post)

TheHackerWire

@thehackerwire

Mar 1, 2026

🔴 CVE-2026-25955 - Critical (9.8) 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 `su... 🔗 https://www.thehackerwire.com/vulnerability/CVE-2026-25955/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack

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