Kernel release status
The current development kernel is 4.8-rc6, released on September 11. "
I still haven't decided whether we're going to do an rc8, but I guess I don't have to decide yet. Nothing looks particularly bad, and it will depend on how rc7 looks."
The known regression list for 4.8 has ten entries as of September 11.
Stable updates: 3.14.79, the last of the 3.14.x series, was released on September 11.
The 4.7.4 (announcement missing) and
4.4.21 stable updates are in the review
process as of this writing; they can be expected at any time.