What is CVE-2020-22043?

CVE-2020-22043 is a medium-severity vulnerability in Ffmpeg, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.5/10. Published 2021-06-01.

How severe is CVE-2020-22043?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2020-22043 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Ffmpeg

CVE-2020-22043

A Denial of Service vulnerability exists in FFmpeg 4.2 due to a memory leak at the fifo_alloc_common function in libavutil/fifo.c.

Published 2021-06-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Ffmpeg — versions 4.2

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

Public proof-of-concept exploits

akaganeite/CVE4PP

References

trac.ffmpeg.org/ticket/8284 (Exploit, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2020-22043?: CVE-2020-22043 is a medium-severity vulnerability in Ffmpeg, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.5/10. Published 2021-06-01.
How severe is CVE-2020-22043?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2020-22043 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.