#VU125363 Out-of-bounds write in FreeRDP - CVE-2026-29774
Published: April 8, 2026
Vulnerability identifier: #VU125363
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-29774
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
FreeRDP
FreeRDP
Software vendor:
FreeRDP
FreeRDP
Description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds write in avc420_yuv_to_rgb in the AVC420/AVC444 YUV-to-RGB conversion path when processing a crafted WIRE_TO_SURFACE_PDU_1 containing out-of-range regionRects coordinates. A remote attacker can send a specially crafted malicious server response to cause a denial of service.
The issue is client-side and is triggered after the H.264 bitstream decodes successfully.
Remediation
Install security update from vendor's website.