The Android kernel is the Linux-based core of the operating system. It manages hardware access, memory, processes, and key security primitives such as permissions enforcement and isolation between components. Everything above it, including apps and many system services, depends on the kernel to behave correctly.
In cyber security, kernel access is a major escalation. A bug or exploit that reaches the Android kernel can bypass app sandboxing, read or alter protected memory, and weaken defenses that normally separate user space from privileged code. Attackers often aim for the kernel after compromising another layer, such as a driver, modem firmware, or a vulnerable system service. Defenders reduce risk by patching kernel flaws quickly, limiting exposed interfaces, and hardening the device stack so that lower-level compromises do not easily become full device control.