In the wake of recent problems, a partial fix has been pushed for SuperSU. Root loss on older (pre-4.4/Kit Kat) phones should no longer be an issue. Unfortunately, this latest update doesn’t fix the bootlooping some Sony Xperia phones are experiencing. If you’re using SuperSU on one, you should continue to stick with 2.79 for now.
In an update to his post on XDA, Chainfire announced that v2.82 should fix some of the problems users were experiencing.
SuperSU v2.82 update fixes most of the recent root problems, Xperia bootloops and other issues may remain was written by the awesome team at Android Police.