CVE-2020-21688
8.8
HIGH
CVSS 3.1
EPSS 0.30%
Description
A heap-use-after-free in the av_freep function in libavutil/mem.c of FFmpeg 4.2 allows attackers to execute arbitrary code.
How to fix CVE-2020-21688
To remediate CVE-2020-21688, upgrade the affected package to a fixed version below.
- Debian/ffmpeg—upgrade to 7:4.3.3-0+deb11u1 or later
Is CVE-2020-21688 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 7:4.3.3-0+deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |