ISC reports:
Prevents a crash when queried for a record whose RDATA exceeds 65535 bytes.
Prevents a crash when validating caused by using "Bad cache" data before it has been initialized.
ISC_QUEUE handling for recursive clients was updated to address a race condition that could cause a memory leak. This rarely occurred with UDP clients, but could be a significant problem for a server handling a steady rate of TCP queries.
A condition has been corrected where improper handling of zero-length RDATA could cause undesirable behavior, including termination of the named process.
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