CVE-2026-66401

LOW

FreeRDP before 3.29.0 Out-of-Bounds Read via UVC H.264

Title source: cna
STIX 2.1

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.

References (3)

Core 3
Core References
Vendor Advisory vendor-advisory
GitHub Security Advisory (GHSA-8jj2-67pg-j6mg)
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8jj2-67pg-j6mg
Third Party Advisory third-party-advisory
VulnCheck Advisory: FreeRDP before 3.29.0 Out-of-Bounds Read via UVC H.264
https://www.vulncheck.com/advisories/freerdp-before-out-of-bounds-read-via-uvc-h-264

Scores

CVSS v3 2.1
EPSS 0.0015
EPSS Percentile 4.8%
Attack Vector PHYSICAL
CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-125
Status published
Products (2)
FreeRDP/FreeRDP < 3.29.0
FreeRDP/FreeRDP 3.29.0
Published Aug 01, 2026
Tracked Since Aug 01, 2026