What is CVE-2020-22044?

CVE-2020-22044 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-2020-22044?

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

Vulnerability in Ffmpeg

CVE-2020-22044

A Denial of Service vulnerability exists in FFmpeg 4.2 due to a memory leak in the url_open_dyn_buf_internal function in libavformat/aviobuf.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 (62.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.6% 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
Debian Linux — versions 9.0

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

trac.ffmpeg.org/ticket/8295 (Exploit, Patch, Vendor Advisory)
lists.debian.org/debian-lts-announce/2021/11/msg00012.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2020-22044?: CVE-2020-22044 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-2020-22044?: Medium severity. CVSS v3 base score is 6.5 out of 10.