What is CVE-2020-22056?

CVE-2020-22056 is a medium-severity vulnerability in Ffmpeg, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.5/10. Published 2021-06-02.

How severe is CVE-2020-22056?

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

Vulnerability in Ffmpeg

CVE-2020-22056

A Denial of Service vulnerability exists in FFmpeg 4.2 due to a memory leak in the config_input function in af_acrossover.c.

Published 2021-06-02 · 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: 0.009 (57.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Ffmpeg — versions 4.2

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

trac.ffmpeg.org/ticket/8304 (Exploit, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2020-22056?: CVE-2020-22056 is a medium-severity vulnerability in Ffmpeg, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 6.5/10. Published 2021-06-02.
How severe is CVE-2020-22056?: Medium severity. CVSS v3 base score is 6.5 out of 10.