Respected software developer that goes by the nickname Chainfire on XDA Developers forums have announced that he managed to find a CF-Auto-Root method that makes the Samung Galaxy S6 and S6 Edge rooted, and the smartphones are not even available anywhere.
Chainfire confirms the first CF-Auto-Root’s for the Galaxy S6 family are ready. His root method is available for the SM-G920T and the SM-G925T models (both T-Mobile US S6 and the Galaxy S6 Edge). Chainfire also gives us a heads up “before actually rooting though, consider that KNOX will likely be tripped, and there’s a good chance untripped KNOX will be required for phone based payments.”
If you are looking to buy one of the S6’s and use Samsung’s own mobile payment system, then obtaining root through this method is not for you.
One can download the CF-Auto-Root repository from here.