Security Enhancements for Android (SEAndroid) is a set of kernel add-ons and tools that make exploitation of certain vulnerabilities harder by enforcing access controls. With Android Nougat, SEAndroid will enforce the application sandbox boundaries in Android 4.3 (Jelly Bean) The OS has also hardened the media-handling processes, which have been a source of many vulnerabilities over the past year. These include various memory protections, as well as changes intended to reduce the kernel’s attack surface.”]
Source: https://www.csoonline.com/article/3101772/google-beefs-linux-up-kernel-defenses-in-android.html