[Bug 1141832] VUL-1: CVE-2019-13615: vlc: VideoLAN VLC media player 3.0.7.1 has a heap-based buffer over-read in mkv:demux_sys_t:FreeUnused() in modules/demux/mkv/demux.cpp when called from mkv:Open in modules/demux/mkv/mkv.cpp.