Kernel-based
As the name suggests, KernelSU works under the Linux kernel giving it more control over userspace apps.
KernelSU
A kernel-based root solution for Android
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Root access control
Only permitted apps may access or see su, all other apps are not aware of this.
Customizable root privileges
KernelSU allows customization of su's uid, gid, groups, capabilities, and SELinux rules, locking up root privileges.
Modules
Modules may modify /system systemlessly using OverlayFS enabling great power.