A heap-based Buffer Overflow vulnerability exists in FFmpeg 4.2 in get_block_row at libavfilter/vf_bm3d.c, which might lead to memory corru…

published 2021-06-01 5y ago modified 2026-06-17 4mo ago also EUVD-2020-14801

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.2%; EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits: 0; none known

A heap-based Buffer Overflow vulnerability exists in FFmpeg 4.2 in get_block_row at libavfilter/vf_bm3d.c, which might lead to memory corruption and other potential consequences.

Patch / fix

distros 2

debian ubuntu

ffmpeg Debian 14, Debian 13, Debian 12 7:4.3-2

debian advisories DEBIAN-CVE-2020-22035

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

ubuntu advisories UBUNTU-CVE-2020-22035

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

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Exploit prediction

1.17% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

trac.ffmpeg.org https://trac.ffmpeg.org/ticket/8262 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

CWE-787 Out-of-bounds Write

References

trac.ffmpeg.org /ticket/8262
exploit, issue-tracking, vendor-advisory
debian.org /security/2021/dsa-4990
vendor-advisory, third-party-advisory

Sources

CVE List CVE-2020-22035
NVD CVE-2020-22035

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