Kernel-based
KernelSU is working in Linux kernel mode, it has more control over userspace applications.
KernelSU
A kernel-based root solution for Android
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Whitelist access control
Only App that is granted root permission can access `su`, other apps cannot perceive su.
Module support
KernelSU supports modify /system systemlessly by overlayfs, it can even make system writable.
Open source
KernelSU is a open source project under GPL-3 License.