This post aims at giving an overview of what SELinux is, how it is implemented, and how to bypass it, from the point of view of Android kernel exploitation. Tests were performed on three devices: a Samsung Galaxy A34, a Huawei Mate 20 Pro, and a Xiaomi Redmi Note 12. We will focus mainly on the first two, because they have a hypervisor that will make privilege escalation and bypassing SELinux more difficult.