The team at Paranoid Android have dropped their latest update out for devices, bringing a patch for the KRACK vulnerability along with other core changes to the platform. The latest build is version 7.3.1 for those keeping score at home and likely will be the last significant update to the Android Nougat-based build with attention turning to Oreo.
As with other PA releases, there are core changes then their are device specific updates too. As for general updates, most of these focus on improvements and fixes. As mentioned, the KRACK patch is included in this update but also various improvements around WiFI and Bluetooth connectivity, launcher improvements and performance and battery improvements. Pocket Lock has also improved for performance and battery efficiency too.
A new feature that is in this update is an anti-shake mode for the default camera app in Paranoid Android.
When it comes to specific device fixes, the list is pretty long. Several devices like the Nexus 5, OnePlus One and OnePlus X received the BlueBorne kernel patch while the OnePlus 3 got a huge number of fixes and performance updates. The best thing to do is to head to the Paranoid Android site to get the latest info for your particular device. There is also a great rundown of fixes and features for each device over at XDADevelopers.