Vulnerability · Published Aug 19, 2026 · Assigned by VulnCheck

CVE-2026-75144FFmpeg Heap Buffer Overflow in VC-2/Dirac RTP Packetizer

High 7.8

In plain English

A high-severity heap buffer overflow in FFmpeg from FFmpeg. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High

Exploit odds (30 days)0.2%top 90.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	ffmpeg	no fix listed	DEBIAN-CVE-2026-75144
Debian:13	ffmpeg	no fix listed	DEBIAN-CVE-2026-75144
Debian:14	ffmpeg	7:9.0.2-1	DEBIAN-CVE-2026-75144
Ubuntu:26.10	ffmpeg	no fix listed	UBUNTU-CVE-2026-75144

Affected products (as reported)

Vendor	Product	Versions
FFmpeg	FFmpeg	0 – before 1cdeb3c4e7f1f8566d846b9b451e01c376398818

Weakness: CWE-122 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Pull Request issue-tracking
Patch Commit patch
https://www.vulncheck.com/advisories/ffmpeg-heap-buffer-overflow-in-vc-2-dirac-rtp-packetizer third-party-advisory