4.15 was released on Sunday. Fedora will be following the same rebase
procedure that we have in the past: After a few stable releases,
typically 4.15.2 or 4.15.3, F27 will be rebased to 4.15 with F26
rebased shortly there after. I would expect this to happen by the
end of February.
Note this was a tricky kernel release because of all the Spectre/
Meltdown work but that should be settled at this point. More testing
is always appreciated though.