October 2026 Windows 11 Update causes UAC Freexing?

I am also experiencing issues with update KB5127648. 

Since the October 2026 cumulative update KB5127648 was installed, our Windows 11 machines leak kernel paged pool memory until they run out of RAM. They become slow, then freeze. A reboot frees the memory, but the leak starts again right away.

On each machine the problem started the same day the update was installed, and it did not happen before.