FFmpeg through 4.2 has a "Conditional jump or move depends on uninitialised value" issue in h2645_parse because alloc_rbsp_buffer in libavcodec/h2645_parse.c mishandles rbsp_buffer.
https://trac.ffmpeg.org/ticket/8093
https://security.gentoo.org/glsa/202007-58
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00012.html