I would recommend reading up on Bug ID: 403446. According to this, the fix was implemented in 7.3.2P7, 7.3.5.1 and 8.0.1. Which means you would still be at risk running 7.3.2, 7.3.3, 7.3.4 or 7.3.5. It only affects certain configurations, but I'm not sure of your setup, so have a quick look first, I wouldn't want to see you get into trouble.