Updated bind packages fix security vulnerability:
In ISC BIND, a defect in thie "deny-answer-aliases" feature makes it easy, when the feature is in use, to experience an assertion failure in name.c. Accidental or deliberate triggering of this defect will cause a REQUIRE assertion failure in named, causing the named process to stop execution and resulting in denial of service to clients (CVE-2018-5740).
Note that only servers which have explicitly enabled the "deny-answer-aliases" feature are at risk and disabling the feature prevents exploitation.