In GNU Libextractor 1.4, there is a NULL Pointer Dereference in flac_metadata in flac_extractor.c.
https://lists.debian.org/debian-lts-announce/2017/12/msg00000.html
http://www.securityfocus.com/bid/101272
http://openwall.com/lists/oss-security/2017/10/11/1
http://lists.gnu.org/archive/html/bug-libextractor/2017-10/msg00003.html