FontForge 20161012 does not ensure a positive size in a weight vector memcpy call in readcfftopdict (parsettf.c) resulting in DoS via a crafted otf file. Upstream issue: https://github.com/fontforge/fontforge/issues/3091
Created fontforge tracking bugs for this issue: Affects: fedora-all [bug 1475398]
Fixed in rawhide build fontforge-20170731-1.fc27