Hubris is an open-source operating system designed for deeply-embedded computer systems. Developed by Oxide Computer Company, it’s an all-Rust system that focuses on security, robustness, and efficiency for embedded systems.

Hubris employs a microkernel-based architecture, allowing for safety and isolation. It also uses a strictly synchronous task model, making it easier to develop and understand. One of the unique features of Hubris is that it fully specifies the tasks for a particular application at build time, combining the kernel with the selected tasks to produce a single attestable image.


  • All-Rust System: Hubris is developed entirely in the Rust programming language, ensuring memory safety and concurrency.
  • Microkernel-based: This design allows for enhanced safety and isolation between tasks.
  • Strictly Synchronous Task Model: Simplifies development and comprehension.
  • Static Task Specification: Tasks for a specific application are fully specified at build time, eliminating dynamic resource exhaustion issues.
  • Memory Protection: Even in memory-safe languages like Rust, Hubris ensures memory protection, with tasks, the kernel, and drivers all in separate protection domains.


  • Kernel: The core component that manages system resources and tasks.
  • Tasks: Pre-defined operations or applications that the system can run.
  • Drivers: Software components that allow the OS to interact with hardware devices.
  • Debugger (Humility): A debugging tool developed alongside Hubris to ensure system quality and debuggability.
  • brev. 💀 Do or die: quick and dirty utility functions in rust.

Hubris Platforms

  • ARM

Hubris Components

  • None