CVE-2020-21697

MEDIUM 6.5CVE-2020-21697 · Published 10/08/2021 · updated 17/06/2026

In short

CVE-2020-21697 is a MEDIUM (CVSS 6.5) vulnerability affecting ffmpeg (ffmpeg).
Chance of exploitation in the next 30 days (EPSS): 0.92%, higher than 60.3% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
ffmpeg ffmpeg	`= 4.2`	No fix yet

Description

A heap-use-after-free in the mpeg_mux_write_packet function in libavformat/mpegenc.c of FFmpeg 4.2 allows to cause a denial of service (DOS) via a crafted avi file.

References

trac.ffmpeg.org/ticket/8188 · Exploit
debian.org/security/2021/dsa-4998 · Third Party Advisory

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Package

Affected versions

Patched versions

ffmpeg

= 4.2

No fix yet

More vulnerabilities in ffmpeg

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