CVE-2020-22020

Name	CVE-2020-22020
Description	Buffer Overflow vulnerability in FFmpeg 4.2 in the build_diff_map function in libavfilter/vf_fieldmatch.c, which could let a remote malicious user cause a Denial of Service.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-2742-1, DSA-4990-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
ffmpeg (PTS)	bullseye	7:4.3.7-0+deb11u1	fixed
	bullseye (security)	7:4.3.8-0+deb11u3	fixed
	bookworm, bookworm (security)	7:5.1.6-0+deb12u1	fixed
	trixie, sid	7:7.1.1-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
ffmpeg	source	stretch	7:3.2.15-0+deb9u3	DLA-2742-1
ffmpeg	source	buster	7:4.1.8-0+deb10u1	DSA-4990-1
ffmpeg	source	(unstable)	7:4.3-2

https://trac.ffmpeg.org/ticket/8239
https://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=ce5274c1385d55892a692998923802023526b765