Netwide Assembler (NASM) 2.14rc15 has an invalid memory write (segmentation fault) in expand_smacro in preproc.c, which allows attackers to cause a denial of service via a crafted input file. Upstream bug: https://bugzilla.nasm.us/show_bug.cgi?id=3392508
Created nasm tracking bugs for this issue: Affects: fedora-all [bug 1629991]
Unable to reproduce on RHEL 5-7.