CVE-2026-55191 | FreeRDP up to 3.26.x H.264 Codec libfreerdp/codec/h264.c avc444_ensure_buffer heap-based overflow

August 19, 2026 Yanac

A vulnerability was found in FreeRDP up to 3.26.x and classified as critical. This vulnerability affects the function avc444_ensure_buffer of the file libfreerdp/codec/h264.c of the component H.264 Codec. The manipulation results in heap-based buffer overflow.

This vulnerability is cataloged as CVE-2026-55191. The attack may be launched remotely. There is no exploit available.

It is suggested to upgrade the affected component.VulDB Recent EntriesRead More