#VU125348 Use-after-free in FreeRDP - CVE-2026-25955
Published: April 8, 2026
Vulnerability identifier: #VU125348
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-25955
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
FreeRDP
FreeRDP
Software vendor:
FreeRDP
FreeRDP
Description
The vulnerability allows a remote attacker to cause a denial of service and potentially execute arbitrary code.
The vulnerability exists due to use-after-free in xf_AppUpdateWindowFromSurface when processing crafted RDPGFX surface updates from a malicious server. A remote attacker can send crafted surface create, delete, and repaint sequences to cause a denial of service and potentially execute arbitrary code.
Exploitation requires a client connection to a malicious RDP server with RAIL and RDPGFX support, and the issue is triggered in the X11 client with SoftwareGdi enabled.
Remediation
Install security update from vendor's website.