CVE-2020-20446

Name: CVE-2020-20446
Creator: NVD / NIST
Published: 2021-05-25T18:15:07.953+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.73%

Last modified Jun 17, 2026

CVE-2020-20446 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. FFmpeg 4.2 is affected by a Divide By Zero issue via libavcodec/aacpsy.c, which allows a remote malicious user to cause a Denial of Service.. EPSS estimates a 1.73% chance of exploitation in the next 30 days.

Description

FFmpeg 4.2 is affected by a Divide By Zero issue via libavcodec/aacpsy.c, which allows a remote malicious user to cause a Denial of Service.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.73%

74.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-369

Affected Software

Vendor	Product	Versions
Ffmpeg	Ffmpeg	4.2
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Debian	Debian Linux	11.0

References

https://lists.debian.org/debian-lts-announce/2021/11/msg00012.htmlMailing List, Third Party Advisory
https://trac.ffmpeg.org/ticket/7995Exploit, Issue Tracking, Vendor Advisory
https://www.debian.org/security/2021/dsa-4990Third Party Advisory
https://www.debian.org/security/2021/dsa-4998Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/11/msg00012.htmlMailing List, Third Party Advisory
https://trac.ffmpeg.org/ticket/7995Exploit, Issue Tracking, Vendor Advisory
https://www.debian.org/security/2021/dsa-4990Third Party Advisory
https://www.debian.org/security/2021/dsa-4998Third Party Advisory

Timeline

Published: May 25, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-20446?

FFmpeg 4.2 is affected by a Divide By Zero issue via libavcodec/aacpsy.c, which allows a remote malicious user to cause a Denial of Service.

How severe is CVE-2020-20446?

CVE-2020-20446 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.73% probability of exploitation in the next 30 days.

How do I fix CVE-2020-20446?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-20446?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST