Is this a known bug with a fix?

I'm a long way into the game. All of a sudden it crashes every time I enter combat. Whether it's a giant ant (which was the first occasion- at nellis generator room) or a thug in freeside. If a companion attacks it's the same.

I'm wondering if it's caused by a specific weapon that Boone is using. I've recently given him a larger selection to carry.

I hope the fix is known. It makes the game unplayable.