Yakkety has 0.6.5.7. If you're asking about Xenial, you should read up on Ubuntu's SRU process.
** Changed in: zfs-linux (Ubuntu) Status: New => Fix Released -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to zfs-linux in Ubuntu. https://bugs.launchpad.net/bugs/1620898 Title: 0.6.5.6 outdated. Latest version of ZoL on OpenZFS site is 0.6.5.7. Status in zfs-linux package in Ubuntu: Fix Released Bug description: If possible, please update zfs stack to 0.6.5.7, to include upstream bug fixes. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1620898/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp