CVE-2018-6621

Name: CVE-2018-6621
Creator: NVD / NIST
Published: 2018-02-05T04:29:00.917+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 2.18%

Last modified Jun 17, 2026

CVE-2018-6621 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. The decode_frame function in libavcodec/utvideodec.c in FFmpeg through 3.2 allows remote attackers to cause a denial of service (out of array read) via a crafted AVI file.. EPSS estimates a 2.18% chance of exploitation in the next 30 days.

Description

The decode_frame function in libavcodec/utvideodec.c in FFmpeg through 3.2 allows remote attackers to cause a denial of service (out of array read) via a crafted AVI file.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

2.18%

80.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Ffmpeg	Ffmpeg	<= 3.2
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0

References

http://www.securityfocus.com/bid/102950Third Party Advisory, VDB Entry
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/118e1b0b3370dd1c0da442901b486689efd1654bPatch, Third Party Advisory
https://github.com/FFmpeg/FFmpeg/commit/22aa37c0fedf14531783189a197542a055959b6cPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/01/msg00006.htmlMailing List, Third Party Advisory
https://www.debian.org/security/2018/dsa-4249Third Party Advisory
http://www.securityfocus.com/bid/102950Third Party Advisory, VDB Entry
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/118e1b0b3370dd1c0da442901b486689efd1654bPatch, Third Party Advisory
https://github.com/FFmpeg/FFmpeg/commit/22aa37c0fedf14531783189a197542a055959b6cPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/01/msg00006.htmlMailing List, Third Party Advisory
https://www.debian.org/security/2018/dsa-4249Third Party Advisory

Timeline

Published: Feb 5, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-6621?

The decode_frame function in libavcodec/utvideodec.c in FFmpeg through 3.2 allows remote attackers to cause a denial of service (out of array read) via a crafted AVI file.

How severe is CVE-2018-6621?

CVE-2018-6621 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 2.18% probability of exploitation in the next 30 days.

How do I fix CVE-2018-6621?

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-2018-6621?

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

Scan your code now

Source: NVD / NIST