We are getting the same issue on our server, mission file wasn't changed and then suddenly everyone is getting STATUS_ACCESS_VIOLATION all the time, I've tried everything besides reinstalling windows at this point.
I've tried different mallocs.
I've tried test servers with no mods.
I've tried changing settings in several files and mysql settings, I can't even remember anymore because I've been busting my butt since the update trying to figure it out.