CVE-2026-75144

high

Description

FFmpeg before commit 1cdeb3c contains a heap buffer overflow vulnerability in the VC-2/Dirac RTP packetizer (libavformat/rtpenc_vc2hq.c) that allows attackers to trigger memory corruption by supplying a crafted Dirac data unit. The packetizer copies an input-derived data unit or fragment size into a fixed-size buffer without an upper bound check, causing a heap buffer overflow when the crafted input is packetized for RTP output.

References

https://www.vulncheck.com/advisories/ffmpeg-heap-buffer-overflow-in-vc-2-dirac-rtp-packetizer

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24091

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/1cdeb3c4e7f1f8566d846b9b451e01c376398818

Details

Source: Mitre, NVD

Published: 2026-08-19

Updated: 2026-08-19

Risk Information

CVSS v2

Base Score: 7.2

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

Severity: High

CVSS v3

Base Score: 7.8

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

Severity: High

CVSS v4

Base Score: 8.5

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

Severity: High