What is CVE-2021-38092?

CVE-2021-38092 is a high-severity vulnerability in Ffmpeg, classified under Integer Overflow or Wraparound. CVSS score: 8.8/10. Published 2021-09-20.

How severe is CVE-2021-38092?

High severity. CVSS v3 base score is 8.8 out of 10.

Integer overflow in Ffmpeg

CVE-2021-38092

Integer Overflow vulnerability in function filter_prewitt in libavfilter/vf_convolution.c in Ffmpeg 4.2.1, allows attackers to cause a Denial of Service or other unspecified impacts.

Vulnerability class: Integer Overflow

Published 2021-09-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (69.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.5% 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 4.2.1

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

trac.ffmpeg.org/ticket/8263 (Exploit, Issue Tracking, Vendor Advisory)
git.ffmpeg.org/gitweb/ffmpeg.git/commit/99f8d32129dd233d4eb2efa44678a0bc44869f23 (Patch, Mailing List, Vendor Advisory)

Frequently asked questions

What is CVE-2021-38092?: CVE-2021-38092 is a high-severity vulnerability in Ffmpeg, classified under Integer Overflow or Wraparound. CVSS score: 8.8/10. Published 2021-09-20.
How severe is CVE-2021-38092?: High severity. CVSS v3 base score is 8.8 out of 10.