yasm v1.3.0 was discovered to contain a memory leak via the function yasm_intnum_copy at /libyasm/intnum.c. Reference: https://github.com/yasm/yasm/issues/210
Created yasm tracking bugs for this issue: Affects: epel-all [bug 2208613] Affects: fedora-all [bug 2208612]
This should be rejected as per yasm security policy, unless there's a way this could be exploited using *trusted* input: https://github.com/yasm/yasm/blob/master/SECURITY.md
Fixed in: https://github.com/yasm/yasm/pull/231/commits/168febbc155c832439be9500452ebe39994d2309 .