In NASM 2.15.04rc3, there is a double-free vulnerability in pp_tokline asm/preproc.c. This is fixed in commit 8806c3ca007b84accac21dd88b900fb03614ceb7.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24978
Reference (s):
- https://bugzilla.nasm.us/show_bug.cgi?id=3392712

