CVE-2016-6172 (authoritative_server, leap, opensuse)
PowerDNS (aka pdns) Authoritative Server before 4.0.1 allows remote primary DNS servers to cause a denial of service (memory exhaustion and secondary DNS server crash) via a large (1) AXFR or (2) IXFR response.
Source: CVE-2016-6172 (authoritative_server, leap, opensuse)