From Upstream Release notes:
Security Fixes
DNS rebinding protection was ineffective when BIND 9 is configured as a forwarding DNS server. Found and responsibly reported by Tobias Klein. [GL #1574]
Known Issues
We have received reports that in some circumstances, receipt of an IXFR can cause the processing of queries to slow significantly. Some of these were related to RPZ processing, which has been fixed in this release (see below). Others appear to occur where there are NSEC3-related changes (such as an operator changing the NSEC3 salt used in the hash calculation). These are being investigated. [GL #1685]
Red Hat has alternative variant builds of named, which are not ever
tested by system tests. New variables make it relatively easy to test
alternative variants.
For sdb variant use:
export NAMED_VARIANT=-sdb DNSSEC_VARIANT=
For pkcs variant use:
export NAMED_VARIANT=-pkcs11 DNSSEC_VARIANT=-pkcs11
followed by make test in build directory.
Note: PKCS11 tests are still skipped, it requires SLOT variable
exported. Fails in some cases.