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No exploitation reportedFix available

CVE-2021-38291

No exploitation reported by the sources we read.

  • Published2021-08-12
  • Fixed in4.4.1 · 4.3.3 · 4.2.5 · 4.1.7
  • WeaknessCWE-617

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC
  1. 2021-08-1216:15CVE publishedNVD

Versions per branch

NVD
Ffmpeg
BranchAffectedFixed in
4.4≥ 4.4.0, < 4.4.14.4.1
4.3≥ 4.3.0, < 4.3.34.3.3
4.2≥ 4.2.0, < 4.2.54.2.5
4.1< 4.1.74.1.7
Debian debian linux
BranchAffectedFixed in
9.0= 9.0no fix published
10.0= 10.0no fix published
11.0= 11.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • ffmpegUbuntu:Pro:16.04:LTSall versions · fixed in 7:2.8.17-0ubuntu0.1+esm4
  • ffmpegUbuntu:22.04:LTSall versions · fixed in 7:4.4.2-0ubuntu0.22.04.1
  • ffmpegUbuntu:20.04:LTSall versions · fixed in 7:4.2.7-0ubuntu0.1
  • ffmpegUbuntu:18.04:LTSall versions · fixed in 7:3.4.11-0ubuntu0.1
  • ffmpegSUSE:Linux Enterprise Workstation Extension 15 SP6all versions · fixed in 3.4.2-150200.11.57.1
  • ffmpegSUSE:Linux Enterprise Workstation Extension 15 SP5all versions · fixed in 3.4.2-150200.11.57.1
  • ffmpegSUSE:Linux Enterprise Module for Package Hub 15 SP6all versions · fixed in 3.4.2-150200.11.57.1
  • ffmpegSUSE:Linux Enterprise Module for Package Hub 15 SP5all versions · fixed in 3.4.2-150200.11.57.1

33 more package ranges on OSV.dev

Full record on NVD

Fix

  1. Update Ffmpeg to 4.4.1 · 4.3.3 · 4.2.5 · 4.1.7

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2021-08-12
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-4525-66vv-3hwf

Frequently asked questions

What is CVE-2021-38291?

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

Is CVE-2021-38291 actively exploited?

Active exploitation of CVE-2021-38291 has not been confirmed. Its EPSS score was 2.7% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-38291?

CVE-2021-38291 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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