CVE-2021-38291

Name: CVE-2021-38291
Creator: NVD / NIST
Published: 2021-08-12T16:15:10.49+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.69%

Last modified Jun 17, 2026

CVE-2021-38291 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640) suffers from a an assertion failure at src/libavutil/mathematics.c.. EPSS estimates a 2.69% chance of exploitation in the next 30 days.

Description

FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640) suffers from a an assertion failure at src/libavutil/mathematics.c.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.69%

84.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-617

Affected Software

Vendor	Product	Versions
Ffmpeg	Ffmpeg	< 4.1.7
Ffmpeg	Ffmpeg	>= 4.2.0, < 4.2.5
Ffmpeg	Ffmpeg	>= 4.3.0, < 4.3.3
Ffmpeg	Ffmpeg	>= 4.4.0, < 4.4.1
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://security.gentoo.org/glsa/202312-14
https://trac.ffmpeg.org/ticket/9312Exploit, Patch, 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://security.gentoo.org/glsa/202312-14
https://trac.ffmpeg.org/ticket/9312Exploit, Patch, Vendor Advisory
https://www.debian.org/security/2021/dsa-4990Third Party Advisory
https://www.debian.org/security/2021/dsa-4998Third Party Advisory

Timeline

Published: Aug 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-38291?

FFmpeg version (git commit de8e6e67e7523e48bb27ac224a0b446df05e1640) suffers from a an assertion failure at src/libavutil/mathematics.c.

How severe is CVE-2021-38291?

CVE-2021-38291 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.69% probability of exploitation in the next 30 days.

How do I fix CVE-2021-38291?

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-2021-38291?

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

Scan your code now

Source: NVD / NIST