Ubuntu 26.10 Rust: Stripped GRUB & Coreutils Security Overhaul

TL;DR

• Ubuntu 26.10 'Stonking Stingray' is set to launch October 15, 2026.
• It features a stripped-down GRUB for a tighter security posture.
• The release integrates full Rust coreutils, fixing 113 audited issues.

The news in 60 seconds

Ubuntu 26.10, codenamed 'Stonking Stingray,' is on the horizon, slated for an October 15, 2026 release. This isn't just another interim update, it's a testing ground for some serious security upgrades before the next LTS. Canonical is pushing hard on hardening the system, with a particular focus on the boot process and fundamental system utilities. You're looking at GNOME 51 and Linux Kernel 7.2 too, but the real story is under the hood.

Under the hood

The big deal here is the move to Rust for coreutils and a stripped GRUB. For years, bootloaders like GRUB have been attack vectors. But Canonical is cutting down GRUB's attack surface, removing unnecessary modules. And then there's Rust. Moving critical components to a memory-safe language like Rust significantly reduces a whole class of vulnerabilities, like buffer overflows. The coreutils, those basic commands you use every day, are getting rewritten. After an audit that flagged 113 issues, they're not messing around. It's a huge undertaking, but it means a more robust system from the ground up. Here's a peek at what a simple ls might look like in a Rust-based coreutils implementation, much like the one found in the uutils/coreutils project:

use std::fs;
use std::path::Path;

fn ls_dir(path: &Path) -> Result<(), std::io::Error> {
    for entry in fs::read_dir(path)? {
        let entry = entry?;
        let file_name = entry.file_name();
        // Basic output for demonstration
        println!("{}", file_name.to_string_lossy());
    }
    Ok(())
}

fn main() {
    let current_dir = Path::new(".");
    if let Err(e) = ls_dir(current_dir) {
        eprintln!("Error listing directory: {}", e);
        std::process::exit(1);
    }
}

Try it yourself

Want to get a feel for Rust coreutils today? You can play with the upstream uutils project.

1. Install Rust: curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh.
2. Clone the uutils/coreutils repository from GitHub: git clone https://github.com/uutils/coreutils.git.
3. Build and run a specific utility, like ls: cd coreutils && cargo run --bin ls -- ..

Notes & gotchas

1. This is an interim release. It's not an LTS, so don't deploy it to critical production systems where you expect five years of support. It's a preview of what's coming in future stable releases.
2. Stripping GRUB means less complexity, but it might also mean less flexibility for niche boot configurations. If you rely on highly custom GRUB modules, you'll need to check compatibility.
3. While Rust is memory-safe, it's not a silver bullet. Logic bugs can still exist. The uutils project has been audited, but integrating it into a full OS like Ubuntu means more testing and potential for new interactions.

Watch next

Keep an eye on the uutils/coreutils GitHub repository. That's the upstream project driving a lot of this Rust-ification. Any major architectural changes or new utility rewrites will likely land there first before hitting Ubuntu's release cycle. It's where the real work happens. And, of course, follow the official Ubuntu development mailing lists for specific updates on the GRUB changes and Rust integration progress.