Linux Landlock LSM lets any user sandbox apps without root privileges

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Landlock is a Mandatory Access Control (MAC) security feature built into the Linux kernel since version 5.13. Unlike traditional tools such as SELinux or AppArmor, it allows any user — without administrator rights — to create sandboxes that restrict a process's access to specific file system paths. Once a Landlock restriction is activated, the kernel blocks the sandboxed process from accessing any paths not explicitly permitted, regardless of the user's ID. This makes it significantly easier to limit the damage from exploits, such as a compromised browser, without requiring complex policy languages or root access. The feature integrates directly into the kernel as an additional security layer on top of Linux's existing Discretionary Access Control system.

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