Yeah, you can always go 3.63 to 3.65 if something is made for 3.65, but you can't do the opposite without a motherboard replacement...
Neither is likely (the new - and most importantly - future exploit is supposed to be for 3.67 first/only), but as said you can update when something is actually out; treat every claim you can't download and install yourself as speculation (regardless of plausibility of the claim or of who made it) and you won't be disappointed when it gets delayed or worse