Are MIUI aware of this root exploit!

May 12, 2012
Just taking a quick glance at it and it seems like this would affect any kernel which pulled from the Samsung kernel source. MIUI is now based off of stock ROMs and not CM. This would imply that they are using the stock kernel which would certainly pull from Samsung sources. Unless MIUI used a stock firmware which was patched against this exploit, yes MIUI is affected on those devices.

I am not a developer or expert by any means, this is simply what the situation looks like to me.