FreeRDP up to 3.32.1 GDI gdi_resize_ex null pointer dereference

Summaryinfo

A vulnerability classified as problematic has been found in FreeRDP. This affects the function gdi_resize_ex of the component GDI. Performing a manipulation results in null pointer dereference. This vulnerability is reported as CVE-2026-121402. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in FreeRDP. This affects the function gdi_resize_ex of the component GDI. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. The summary by CVE is:

FreeRDP before 3.32.2 contains a NULL pointer dereference vulnerability that allows malicious RDP servers to crash xfreerdp clients by sending a zero-width RDPGFX ResetGraphics PDU. The failed resize in gdi_resize_ex leaves the primary display null without ending the session, so a later bitmap update crashes the client in gdi_Bitmap_Paint.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-121402 since 11/03/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

Upgrading to version 3.32.2 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Remote Access Software

Name

• FreeRDP

Version

• 1.0.0
• 1.0.1
• 1.0.2
• 1.1.0-beta+2013071101
• 1.1.0-beta1
• 2.0.0
• 2.0.0-beta1
• 2.0.0-beta1+android11
• 2.0.0-rc4
• 2.1.0
• 2.1.1
• 2.1.2
• 2.2.0
• 2.3.0
• 2.4.0
• 2.4.1
• 2.7.0
• 2.8.1
• 2.9.0
• 2.11.0
• 2.11.5
• 2.11.6
• 2.11.8
• 3.0.0
• 3.0.0-beta2
• 3.0.0-beta3
• 3.1
• 3.2.0
• 3.4
• 3.5.0
• 3.5.1
• 3.9.0
• 3.20.0
• 3.20.1
• 3.21.0
• 3.22
• 3.22.0
• 3.23.0
• 3.24.0
• 3.24.2
• 3.25.0
• 3.26.0
• 3.27
• 3.27.0
• 3.27.1
• 3.28.0
• 3.29.0
• 3.30.0
• 3.31
• 3.31.0
• 3.32.0
• 3.32.1

License

• open-source

Website

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

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