libavformat/movenc.c in FFmpeg 3.2 and 4.0.2 allows attackers to cause a denial of service (application crash caused by a divide-by-zero er…

published 2018-07-19 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-6313

cvss: 6.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.0%; EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits: 0; none known

libavformat/movenc.c in FFmpeg 3.2 and 4.0.2 allows attackers to cause a denial of service (application crash caused by a divide-by-zero error) with a user crafted audio file when converting to the MOV audio format.

Patch / fix

distros 4 links 2

debian ubuntu suse alpine

ffmpeg Debian 14, Debian 13, Debian 12 7:4.0.2-1

debian advisories DEBIAN-CVE-2018-14395

ffmpeg Ubuntu 18.04 LTS 7:3.4.4-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2018-14395

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

ffmpeg SLE Workstation Extension 15 SP1, SLE Workstation Extension 15, SLE Module for Package Hub 15 +2 more 3.4.2-4.17.26

suse advisories SUSE-SU-2019:1299-2 SUSE-SU-2019:1299-1

ffmpeg Alpine 3.24, Alpine 3.23, Alpine 3.22 +14 more 3.4.4-r0
ffmpeg4 Alpine 3.22, Alpine 3.21, Alpine 3.20 +4 more 3.4.4-r0

alpine advisories ALPINE-CVE-2018-14395

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

github.com/FFmpeg/FFmpeg@fa19fbc commit
github.com/FFmpeg/FFmpeg@2c0e98a commit

Exploit prediction

2.01% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness

CWE-369 Divide By Zero

References

github.com /FFmpeg/FFmpeg/commit/fa19fbcf712a6a6cc5a5cfdc3254a97b9bce6582
patch, third-party-advisory
github.com /FFmpeg/FFmpeg/commit/2c0e98a0b478284bdff6d7a4062522605a8beae5
patch, third-party-advisory
debian.org /security/2018/dsa-4258
vendor-advisory, third-party-advisory
securitytracker.com /id/1041394
vdb-entry, third-party-advisory

Sources

CVE List CVE-2018-14395
NVD CVE-2018-14395

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary