What is CVE-2020-22049?

CVE-2020-22049 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-2020-22049?

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

Vulnerability in Ffmpeg

CVE-2020-22049

A Denial of Service vulnerability exists in FFmpeg 4.2 due to a memory leak in the wtvfile_open_sector function in wtvdec.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: 0.013 (69.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Ffmpeg — versions 4.2
Debian Linux — versions 9.0, 10.0

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

trac.ffmpeg.org/ticket/8314 (Exploit, Issue Tracking, Vendor Advisory)
git.videolan.org/
www.debian.org/security/2021/dsa-4990 (vendor-advisory, Third Party Advisory)
lists.debian.org/debian-lts-announce/2021/11/msg00012.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2020-22049?: CVE-2020-22049 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-2020-22049?: Medium severity. CVSS v3 base score is 6.5 out of 10.