A bit belated for Kaby Lake, but obviously since the socket and processor size are the same cooler master coolers are compatible. However, in the below press-release Cooler Master just sent they are announcing a RYZEN Upgrade kit for their air and LCS coolers.

Intel and AMD’s announcements of their next-gen Kaby Lake and Ryzen processors might have some of you wondering whether you’ll be looking at a total overhaul of your cooling and power supplies to accommodate the new chipsets and motherboards. Cooler Master, a leader in design and manufacturing computer components and peripherals, has already prepared for the launch of these CPUs so you can apply your existing CPU coolers and power supplies to the upgraded chips.

Virtually all of Cooler Master’s liquid and air coolers are compatible with Intel Kaby Lake’s LGA 1151 socket. For AMD Ryzen’s AM4 socket, any models lacking native compatibility can be adapted using an upgrade kit. Check the list below for compatible models, and contact your local retailer or tech support to check for the availability of upgrade kits.
  

So look carefully at the above chart, some coolers are already compatible. A few not and require a mounting kit. Cooler Master did not mention a price for the Ryzen mounting upgrade kits, if it was free then they certainly would have mentioned it of course.

I'll update this news-item once that info arrives.

Update, the kits are free. This is the answer we just got back from Cooler Master:

Virtually all of Cooler Master’s liquid and air coolers are compatible with Intel Kaby Lake’s LGA 1151 socket. For AMD Ryzen’s AM4 socket, any models lacking native compatibility can be adapted using an upgrade kit. These free upgrade kits will be made available soon via our CM store.