VDB-347867 · CVE-2026-25953 · GHSA-p6rq-rxpc-rh3p

FreeRDP up to 3.22.x xf_AppUpdateWindowFromSurface use after free

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.4	$0-$5k	0.00

Summaryinfo

A vulnerability identified as critical has been detected in FreeRDP up to 3.22.x. This vulnerability affects the function xf_AppUpdateWindowFromSurface. The manipulation leads to use after free. This vulnerability is uniquely identified as CVE-2026-25953. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in FreeRDP up to 3.22.x. It has been rated as critical. This issue affects the function xf_AppUpdateWindowFromSurface. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-25953 since 02/09/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 300136 (Linux Distros Unpatched Vulnerability : CVE-2026-25953), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.23.0 eliminates this vulnerability. Applying the patch 1994e9844212a6dfe0ff12309fef520e888986b5 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (300136) and CERT Bund (WID-SEC-2026-0514). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

Fedora Linux
Open Source FreeRDP

Productinfo

Type

Remote Access Software

Name

FreeRDP

Version

License

open-source

Website

Product: https://github.com/FreeRDP/FreeRDP/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 300136
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-25953

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: FreeRDP 3.23.0
Patch: 1994e9844212a6dfe0ff12309fef520e888986b5

Timelineinfo

02/09/2026 CVE reserved
02/26/2026 +17 days Advisory disclosed
02/26/2026 +0 days VulDB entry created
03/02/2026 +4 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-p6rq-rxpc-rh3p
Status: Confirmed

CVE: CVE-2026-25953 (🔒)
GCVE (CVE): GCVE-0-2026-25953
GCVE (VulDB): GCVE-100-347867
CERT Bund: WID-SEC-2026-0514 - FreeRDP: Mehrere Schwachstellen

Entryinfo

Created: 02/26/2026 01:20
Updated: 03/02/2026 03:52
Changes: 02/26/2026 01:20 (70), 02/26/2026 16:35 (7), 03/01/2026 04:23 (13), 03/02/2026 03:52 (2)
Complete: 🔍
Cache ID: 216:EB4:103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.