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.

References

Advisories
More

https://www.vulncheck.com/advisories/freerdp-before-out-of-bounds-read-via-uvc-h-264

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

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

Details

Source: Mitre, NVD

Published: 2026-08-01

Updated: 2026-09-03

Risk Information

CVSS v2

Base Score: 2.1

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:P

Severity: Low

CVSS v3

Base Score: 2.1

Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Severity: Low

CVSS v4

Base Score: 2.4

Vector: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Severity: Low

EPSS

EPSS: 0.00151