Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Freerdp | Freerdp | < 3.23.0 |
Related Weaknesses (CWE)
References
- https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1ePatch
- https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1ePatch
- https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1ePatch
- https://github.com/FreeRDP/FreeRDP/blob/5c7aae27d0417b42b4806c2a5c583ca39dd9ef1ePatch
- https://github.com/FreeRDP/FreeRDP/commit/169d358734509e82663a0d6a0085ae726d439dPatch
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4g54-x8v7-559xExploitMitigationPatch
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-4g54-x8v7-559xExploitMitigationPatch
FAQ
What is CVE-2026-25955?
CVE-2026-25955 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 surfac...
How severe is CVE-2026-25955?
CVE-2026-25955 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-25955?
Check the references section above for vendor advisories and patch information. Affected products include: Freerdp Freerdp.