CVE-2020-22020: Debian Linux

Medium severity, CVSS 6.5. EPSS: 1.5% chance of exploitation in the next 30 days.

Buffer Overflow vulnerability in FFmpeg 4.2 in the build_diff_map function in libavfilter/vf_fieldmatch.c, which could let a remote malicious user cause a Denial of Service.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only
• Ffmpeg Ffmpeg: version 4.2 only

Published 2021-05-26. Last modified 2026-06-17.