CVE-2018-19755

There is an illegal address access at asm/preproc.c (function: is_mmacro)
in Netwide Assembler (NASM) 2.14rc16 that will cause a denial of service
(out-of-bounds array access) because a certain conversion can result in a
negative integer.

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=915087&gt;
• <https://bugzilla.nasm.us/show_bug.cgi?id=3392528&gt;