FreeRDP up to 3.28.9 UVC H.264 extension-unit parser out-of-bounds

Summaryinfo

A vulnerability was found in FreeRDP up to 3.28.9. It has been rated as problematic. The affected element is an unknown function of the component UVC H.264 extension-unit parser. The manipulation leads to out-of-bounds. This vulnerability is traded as CVE-2026-66401. An attack has to be approached locally. There is no exploit available.

Detailsinfo

A vulnerability was found in FreeRDP up to 3.28.9 and classified as problematic. This issue affects an unknown function of the component UVC H.264 extension-unit parser. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

FreeRDP before 3.29.0 contains an out-of-bounds heap read vulnerability in the UVC H.264 extension-unit parser that fails to validate descriptor length before accessing the GUID field. A local attacker with a malicious USB video camera can trigger a heap read beyond allocated bounds during camera stream setup, causing denial of service.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-66401 since 07/26/2026. The exploitation is known to be easy. Attacking locally is a requirement. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 3.29.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-51831). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Remote Access Software

Name

• FreeRDP

Version

• 3.28.0
• 3.28.1
• 3.28.2
• 3.28.3
• 3.28.4
• 3.28.5
• 3.28.6
• 3.28.7
• 3.28.8
• 3.28.9

License

• open-source

Website

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

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

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