How did WaitHax even work technically?

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Ondrashek06

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It's been long patched and it was probably never a recommended exploit, but how in the hell did WaitHax work on the technical side of things? What was the exploit waiting for? Was it like the 360's BadUpdate which constantly refreshes memory until it finds a very specific "hackable" condition?
 
Not sure what you're expecting to get here. Did you try Googling already?
https://www.3dbrew.org/wiki/3DS_System_Flaws
svcWaitSynchronizationN does not decrement the references to valid handles in an array before returning an error when it encounters an invalid handle. This allows one to (slowly) overflow the reference count for a handle object to zero.
 
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