SteamOS 2.148 is now the newest stable release of the Linux-based operating system that ships pre-installed on Steam Machines. While it remains based on the Debian GNU/Linux 8 “Jessie” operating system series, SteamOS 2.148 is powered by the latest Linux 4.14.13 kernel, which includes patches for Spectre and Meltdown flaws. Additionally, SteamOS 2.148 includes new Nvidia, AMD, and Intel graphics drivers. It uses the Nvidia 387.22 proprietary graphics driver for Nvidia GPUs, as well as the open-source Mesa 17.2.4 graphics stack for AMD Radeon and Intel GPUs. Other than that, the update comes with better upgrade support.