CVE-2018-7557

Name: CVE-2018-7557
Creator: NVD / NIST
Published: 2018-02-28T07:29:00.463+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.88%

Last modified Jun 17, 2026

CVE-2018-7557 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. The decode_init function in libavcodec/utvideodec.c in FFmpeg 2.8 through 3.4.2 allows remote attackers to cause a denial of service (Out of array read) via an AVI file with crafted dimensions within chroma subsampling data.. EPSS estimates a 1.88% chance of exploitation in the next 30 days.

Description

The decode_init function in libavcodec/utvideodec.c in FFmpeg 2.8 through 3.4.2 allows remote attackers to cause a denial of service (Out of array read) via an AVI file with crafted dimensions within chroma subsampling data.

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

1.88%

76.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Ffmpeg	Ffmpeg	>= 2.8, <= 3.4.2
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0

References

https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/7414d0bda7763f9bd69c26c068e482ab297c1c96Patch, Vendor Advisory
https://github.com/FFmpeg/FFmpeg/commit/e724bd1dd9efea3abb8586d6644ec07694afceaePatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/01/msg00006.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/202003-65Third Party Advisory
https://www.debian.org/security/2018/dsa-4249Third Party Advisory
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/7414d0bda7763f9bd69c26c068e482ab297c1c96Patch, Vendor Advisory
https://github.com/FFmpeg/FFmpeg/commit/e724bd1dd9efea3abb8586d6644ec07694afceaePatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/01/msg00006.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/202003-65Third Party Advisory
https://www.debian.org/security/2018/dsa-4249Third Party Advisory

Timeline

Published: Feb 28, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-7557?

How severe is CVE-2018-7557?

CVE-2018-7557 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.88% probability of exploitation in the next 30 days.

How do I fix CVE-2018-7557?

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-2018-7557?

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

Scan your code now

Source: NVD / NIST