CVE-2020-20445 (https://trac.ffmpeg.org/ticket/7996): FFmpeg 4.2 is affected by a Divide By Zero issue via libavcodec/lpc.h, which allows a remote malicious user to cause a Denial of Service. CVE-2020-20453 (https://trac.ffmpeg.org/ticket/8003): FFmpeg 4.2 is affected by a Divide By Zero issue via libavcodec/aaccoder, which allows a remote malicious user to cause a Denial of Service
Actually, these bugs look like crap. I can't reproduce and they don't seem to be real security issues anyway.