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.

SeverityHigh

CVSS7.8

Exploit probability—

ProductFFmpeg

PublishedAug 19, 2026

First seenAug 19, 2026

Weakness typeCWE-122CWE-122

How to fix

Update

FFmpeg FFmpeg1cdeb3c4e7f1f8566d846b9b451e01c376398818 or later

Patches

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

Affected products

Product	Affected versions	Fixed in
FFmpeg FFmpeg	v < 1cdeb3c4e7f1f8566d846b9b451e01c376398818	1cdeb3c4e7f1f8566d846b9b451e01c376398818

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