A heap-based Buffer Overflow Vulnerability exists FFmpeg 4.2 at libavfilter/vf_vmafmotion.c in convolution_y_8bit, which could let a remote…

published 2021-05-27 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-14799

cvss: 6.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.5%; EPSS 1.5% chance of exploitation in 30 days, percentile 74%
public exploits: 0; none known

A heap-based Buffer Overflow Vulnerability exists FFmpeg 4.2 at libavfilter/vf_vmafmotion.c in convolution_y_8bit, which could let a remote malicious user cause a Denial of Service.

Patch / fix

distros 5

debian ubuntu suse opensuse arch linux

ffmpeg Debian 14, Debian 13, Debian 12 7:4.3.2-0+deb11u2

debian advisories DEBIAN-CVE-2020-22033

ffmpeg Ubuntu 18.04 LTS 7:3.4.11-0ubuntu0.1
ffmpeg Ubuntu 20.04 LTS 7:4.2.7-0ubuntu0.1

ubuntu advisories UBUNTU-CVE-2020-22033

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

ffmpeg SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +10 more 3.4.2-4.34.2
ffmpeg SLE Workstation Extension 15 SP3, SLE Workstation Extension 15 SP2, SLE Module for Package Hub 15 SP3 +3 more 3.4.2-11.3.1

suse advisories SUSE-SU-2021:2929-1 SUSE-SU-2021:2322-1

ffmpeg openSUSE Leap 15.3 3.4.2-11.3.1

opensuse advisories openSUSE-SU-2021:2322-1

ffmpeg Arch Linux 2:4.4.1-1

arch linux advisories AVG-1989

Exploit prediction

1.50% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

trac.ffmpeg.org https://trac.ffmpeg.org/ticket/8246 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness

CWE-787 Out-of-bounds Write

References

trac.ffmpeg.org /ticket/8246
exploit, issue-tracking, vendor-advisory
debian.org /security/2021/dsa-4990
vendor-advisory, third-party-advisory
cwe.mitre.org /data/definitions/122.html
third-party-advisory

Sources

CVE List CVE-2020-22033
NVD CVE-2020-22033

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary