CVE-2020-21688

HIGH 8.8CVE-2020-21688 · Published 10/08/2021 · updated 17/06/2026

In short

CVE-2020-21688 is a HIGH (CVSS 8.8) vulnerability affecting ffmpeg (ffmpeg).
Chance of exploitation in the next 30 days (EPSS): 1.7%, higher than 77.7% 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

A heap-use-after-free in the av_freep function in libavutil/mem.c of FFmpeg 4.2 allows attackers to execute arbitrary code.

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Package

Affected versions

Patched versions

= 4.2

No fix yet

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