CVE-2026-66401

Low

Description

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.

SeverityLow

CVSS2.1

Exploit probability—

ProductFreerdp

PublishedAug 1, 2026

First seenAug 1, 2026

Weakness typeCWE-125Out-of-bounds read

How to fix

Update

freerdp freerdp3.29.0 or later

Patches

github.com/FreeRDP/FreeRDP/commit/5044d5390035c6fd9a36ad885192d97d21e8a92d

Vendor advisories

github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8jj2-67pg-j6mg

Affected products

Product	Affected versions	Fixed in
freerdp freerdp	v < 3.29.0	3.29.0

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