In Netwide Assembler (NASM) 2.14rc0, there is a use-after-free in the pp_list_one_macro function in asm/preproc.c that will cause a denial of service attack, related to mishandling of line-syntax errors. Upstream bug: https://bugzilla.nasm.us/show_bug.cgi?id=3392429
Created nasm tracking bugs for this issue: Affects: fedora-all [bug 1529336]