This was never confirmed with any evidence and bloomberg only cites anonymous sources. Given Bloomberg's bad track record on infosec stories I say I have my doubts.
Of course I don't know whether or not the NSA knew about Heartbleed. But nothing that would even remotely qualify as evidence has ever been presented.
Of course I don't know whether or not the NSA knew about Heartbleed. But nothing that would even remotely qualify as evidence has ever been presented.