DivestOS is a free operating system (OS) based on the Android mobile platform. It is a soft fork of LineageOS that aims to increase security and privacy, and support older devices. As much as possible it removes proprietary Android components and includes only free-software. DivestOS builds are signed with release-keys so bootloaders may be re-locked on many devices. An automated CVE patcher is used to patch the kernels against many known vulnerabilities.