FFmpeg version n6.1 was discovered to contain an improper validation of array index vulnerability in libavcodec/cbs_h266_syntax_template.c. This vulnerability allows attackers to cause undefined behavior within the application.
https://github.com/ffmpeg/ffmpeg/commit/ce0c178a408d43e71085c28a47d50dc939b60196
https://github.com/FFmpeg/FFmpeg/blob/n6.1.1/libavcodec/cbs_h266_syntax_template.c#L2048
https://gist.github.com/1047524396/a7e9273e12553775826784035333cdd8