The archive_wstring_append_from_mbs function in archive_string.c in libarchive 3.2.2 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted archive file.
https://www.debian.org/security/2018/dsa-4360
https://usn.ubuntu.com/3736-1/
https://lists.debian.org/debian-lts-announce/2018/11/msg00037.html