Rust Moves from Experimental to Core in the Linux Kernel – What It Means

Status Update

At the 2025 Linux kernel maintainer summit the community formally declared that the Rust support in the Linux kernel has graduated from the "experimental" stage. The "experimental" label will be removed and Rust is now considered a core component of the kernel, with long‑term support expected.

Rust support was first merged into the mainline kernel in version 6.1 to evaluate its suitability across technical, process, and social dimensions. Since then, several major Linux distributions have enabled Rust, and the Android kernel uses it on millions of devices.

Technical Implications

Although Rust is now a first‑class language in the kernel, it does not automatically work for every kernel configuration, architecture, or toolchain. Specific combinations remain experimental, for example:

Mixed GCC + LLVM builds.

Upcoming native GCC support for Rust.

Ongoing work is required in multiple areas:

Kernel subsystems need to adopt Rust APIs where appropriate.

Upstream Rust must continue to evolve to meet kernel requirements (e.g., no_std, custom allocators).

Toolchains such as GCC and LLVM need stable Rust front‑ends and cross‑compilation support.

Developers are encouraged to allocate time for learning Rust to contribute to kernel code safely.

Historical Context

The Rust for Linux project started in 2020 with the goal of bringing Rust’s memory‑safety guarantees into kernel development. Early discussions highlighted concerns about maintenance complexity when mixing Rust with existing C code. With explicit backing from Linus Torvalds and other core maintainers, the effort progressed to mainline inclusion and, as of 2025, to a non‑experimental status.