CVE-2020-21041: Debian Linux

High severity, CVSS 7.5. EPSS: 2.1% chance of exploitation in the next 30 days.

Buffer Overflow vulnerability exists in FFmpeg 4.1 via apng_do_inverse_blend in libavcodec/pngenc.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 4.1 only

Published 2021-05-24. Last modified 2026-06-17.