While we are waiting for bind-9.18 (https://bugs.gentoo.org/832218), would it be possible to do a final version bump for the bind-9.16 branch, which is the only one we have in portage? Note that BIND 9.16 is now EOL. Notes for BIND 9.16.50 This is the last maintenance release of BIND 9.16. This version is now end of life. Please upgrade to BIND 9.18, the current stable version. New Features: Added RESOLVER.ARPA to the built in empty zones. [GL #4580] Notes for BIND 9.16.49: Bug Fixes: A regression in cache-cleaning code enabled memory use to grow significantly more quickly than before, until the configured max-cache-size limit was reached. This has been fixed. [GL #4596] Using rndc flush inadvertently caused cache cleaning to become less effective. This could ultimately lead to the configured max-cache-size limit being exceeded and has now been fixed. [GL #4621] The logic for cleaning up expired cached DNS records was tweaked to be more aggressive. This change helps with enforcing max-cache-ttl and max-ncache-ttl in a timely manner. [GL #4591] It was possible to trigger a use-after-free assertion when the overmem cache cleaning was initiated. This has been fixed. [GL #4595] ISC would like to thank Jinmei Tatuya of Infoblox for bringing this issue to our attention.