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<!DOCTYPE html>
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    <title>Linux Protection Rings (Ring 0–3) – Kernel AI Visualization</title>
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    <meta name="author" content="Aleksei Fedorov">
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<h1 class="seo-only">
    Linux Protection Rings – Ring 0 Kernel Architecture
</h1>

<section class="seo-only">

    <h2>What is Ring 0 in Linux?</h2>
    <p>
        In Linux architecture, <strong>Ring 0</strong> is the most privileged CPU protection ring
        where the Linux kernel executes. Ring 0 has unrestricted access to hardware,
        memory management, and CPU instructions.
    </p>

    <h2>Linux Protection Rings Explained</h2>
    <p>
        <strong>Protection rings</strong> are CPU privilege levels used to isolate kernel space
        from user space. Linux primarily uses Ring 0 for the kernel and Ring 3 for user applications.
        Intermediate rings exist in hardware but are generally unused by Linux.
    </p>

    <h2>CPU Privilege Rings in Linux</h2>
    <p>
        CPU privilege rings define which code can execute sensitive instructions.
        User programs run in Ring 3, while system calls trigger controlled transitions
        into Ring 0, ensuring system security and stability.
    </p>

    <h2>Linux Kernel Ring 0 Visualization</h2>
    <p>
        Kernel AI provides an interactive visualization of Linux kernel internals,
        illustrating how system calls, processes, and kernel subsystems operate
        inside Ring 0 in real time.
    </p>

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