libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function lys_parse_mem at lys_parse_mem.c. Reference: https://github.com/CESNET/libyang/issues/1979
Created libyang tracking bugs for this issue: Affects: epel-7 [bug 2184383] Affects: fedora-all [bug 2184382]