FreeRDP up to 2.11.7/3.22.x bitmapDataLength out-of-bounds

Summaryinfo

A vulnerability classified as problematic was found in FreeRDP up to 2.11.7/3.22.x. This affects an unknown part. The manipulation of the argument bitmapDataLength results in out-of-bounds. This vulnerability is cataloged as CVE-2026-25941. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, was found in FreeRDP up to 2.11.7/3.22.x. Affected is an unknown function. The manipulation of the argument bitmapDataLength with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality. CVE summarizes:

FreeRDP is a free implementation of the Remote Desktop Protocol. Versions on the 2.x branch prior to to 2.11.8 and on the 3.x branch prior to 3.23.0 have an out-of-bounds read vulnerability in the FreeRDP client's RDPGFX channel that allows a malicious RDP server to read uninitialized heap memory by sending a crafted WIRE_TO_SURFACE_2 PDU with a `bitmapDataLength` value larger than the actual data in the packet. This can lead to information disclosure or client crashes when a user connects to a malicious server. Versions 2.11.8 and 3.23.0 fix the issue.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-25941 since 02/09/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 300163 (Linux Distros Unpatched Vulnerability : CVE-2026-25941), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.11.8 or 3.23.0 eliminates this vulnerability. Applying the patch 2e3b77e28ac6a398897d28ba464dcc5dfab9c9e2 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 (300163) and CERT Bund (WID-SEC-2026-0514). Once again VulDB remains the best source for vulnerability data.

Affected

• Amazon Linux 2
• Red Hat Enterprise Linux
• Fedora Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• RESF Rocky Linux
• Open Source FreeRDP

Productinfo

Type

• Remote Access Software

Name

• FreeRDP

Version

• 2.11.0
• 2.11.1
• 2.11.2
• 2.11.3
• 2.11.4
• 2.11.5
• 2.11.6
• 2.11.7
• 3.0
• 3.1
• 3.2
• 3.3
• 3.4
• 3.5
• 3.6
• 3.7
• 3.8
• 3.9
• 3.10
• 3.11
• 3.12
• 3.13
• 3.14
• 3.15
• 3.16
• 3.17
• 3.18
• 3.19
• 3.20
• 3.21
• 3.22

License

• open-source

Website

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

CPE 2.3info

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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