This flaw only affects bind-9.16.x, therefore versions of BIND shipped with Red Hat Products are not affected by this flaw.
An attacker who is permitted to send zone data to a server via zone transfer can exploit this to intentionally trigger the assertion failure with a specially constructed zone, denying service to clients.
An assertion check flaw caused by a buffer boundary check condition was found in BIND. A remote attacker could trigger this flaw via a large response, during zone transfer. The highest threat from this vulnerability is to system availability.