Yasm v1.3.0.78 was found prone to NULL Pointer Dereference in /libyasm/intnum.c and /elf/elf.c, which allows the attacker to cause a denial of service via a crafted file.
https://github.com/yasm/yasm/issues/233
https://gist.github.com/ChanStormstout/02eea9cf5c002b42b2ff3de5ca939520