[hmottestad]

“We also tested DMP activation patterns on other Apple processors and found that m2 and m3 CPUs also exhibit similar exploitable DMP behavior.”

Found this on the exploit site.

But it also says: "We observe that the DIT bit set on m3 CPUs effectively disables the DMP. This is not the case for the m1 and m2."

So if libraries set the DIT bit then M3 should be safe.