Linux is poised for a significant transformation with its stable kernel maintainer, Greg Kroah-Hartman, championing Rust over C as the future programming language for Linux development. During his keynote at the Open Source Summit India 2026, Kroah-Hartman announced that the Linux kernel is shifting towards Rust, which he believes is essential for improving both code safety and maintainability.
In his evolution from skepticism of Rust to a strong advocate, Kroah-Hartman cited Rust’s ability to eliminate various common vulnerabilities and streamline the coding process, making it easier for developers. He emphasized that while C won’t disappear immediately—given its deep-rooted presence in the Linux ecosystem—Rust is becoming a preferred choice, particularly for new projects and subsystems.
He explained that Rust’s ownership and type system significantly reduce trivial bugs that often plague C code, such as unchecked pointers and memory leaks. In fact, he estimated that 80% of the Common Vulnerabilities and Exposures (CVEs) observed in the kernel over the past 25 years could have been avoided if Rust had been utilized instead.
The transition is reflected in the integration of Rust into existing C APIs and the establishment of guidelines for new development, particularly important subsystems. For instance, new drivers will predominantly be accepted in Rust, signaling a concrete change in how Linux kernel enhancements are approached.
This change is not merely theoretical; the kernel leadership officially recognized Rust as a first-class language, no longer just an experiment. Despite Kroah-Hartman’s acknowledgment of the challenges adaptation might bring, especially for a community heavily invested in C, he remains optimistic. He believes that Rust offers a solution that makes coding enjoyable and leads to a more secure Linux experience for users.
In summary, Rust is on the brink of becoming integral to Linux development, promising to enhance the safety and reliability of the kernel while allowing developers to focus more on logic rather than low-level issues. This major shift signifies a broader trend in programming toward safer languages, keeping Linux relevant and competitive in the ever-evolving tech landscape.
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