FreeRDP up to 3.32.2 WinPR png_write_data heap-based overflow

Summaryinfo

A vulnerability marked as problematic has been reported in FreeRDP up to 3.32.2. This affects the function png_write_data of the component WinPR. The manipulation leads to heap-based overflow. This vulnerability is traded as CVE-2026-109256. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in FreeRDP up to 3.32.2 and classified as problematic. This issue affects the function png_write_data of the component WinPR. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is availability. The summary by CVE is:

FreeRDP 3.10.0 through 3.32.2 contains a heap buffer overflow in the WinPR png_write_data callback that writes past the buffer after a realloc failure. A malicious RDP clipboard peer can supply a large CF_DIB image that triggers out-of-bounds memcpy during PNG conversion, causing a client crash.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-109256 since 10/12/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/12/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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

• 3.32.0
• 3.32.1
• 3.32.2

License

• open-source

Website

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

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CPE 2.2info

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Entryinfo

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

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