In Libav 12.3, a denial of service in the subtitle decoder allows attackers to hog the CPU via a crafted video file in Matroska format, because srttoass in libavcodec/srtdec.c has a complex format argument to sscanf.
{ "versions": [ { "introduced": "0" }, { "last_affected": "12.3" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-9717.json"