ISC BIND 9.x before 9.9.9-P2, 9.10.x before 9.10.4-P2, and 9.11.x before 9.11.0b2, when lwresd or the named lwres option is enabled, allows remote attackers to cause a denial of service (daemon crash) via a long request that uses the lightweight resolver protocol.
https://security.netapp.com/advisory/ntap-20160722-0002/
https://security.gentoo.org/glsa/201610-07
https://access.redhat.com/errata/RHSA-2017:2533
https://access.redhat.com/errata/RHBA-2017:1767
https://access.redhat.com/errata/RHBA-2017:0651