The svg_probe function in libavformat/img2dec.c in FFmpeg through 3.4.2 allows remote attackers to cause a denial of service (Infinite Loop) via a crafted XML file.
https://security.gentoo.org/glsa/202003-65
https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/a6cba062051f345e8ebfdff34aba071ed73d923f