Microsoft's AI scanner found Rust standard library bugs that safe code can trigger

Microsoft's FORGE Lab reported on November 9 that it found several memory-safety issues in Rust's core and std libraries, including cases where code written entirely in safe Rust can trigger undefined behavior. The lab said its AI scanner Hyenas helped surface the soundness flaws, which Microsoft reproduced. The findings matter because Rust's adoption for foundational software rests on the promise that safe code cannot cause memory-safety failures, and the results show where that promise depends on unsafe code.

Microsoft's AI scanner found Rust standard library bugs that safe code can trigger FORGE Lab says Hyenas helped surface soundness flaws in Rust core and std. By Ryan Merket https://runtimewire.com/author/ryan-merket · Published Primary source: www.microsoft.com https://www.microsoft.com/en-us/security/blog/2026/11/09/forge-lab-uses-agentic-tools-to-identify-memory-safety-issues-in-rust/ Why it matters Rust is being adopted for foundational software on the promise that safe code cannot cause memory-safety failures. Microsoft's reproduced stdlib findings show where that promise depends on unsafe code, and why AI tools that understand operating-system behavior may expand the search space for soundness bugs. Microsoft's FORGE Lab said on November 9th that it found several memory-safety issues in Rust's core and std libraries, including cases where code written entirely in safe Rust can trigger undefined behavior.… When you purchase through links in our articles, we may earn a small commission https://runtimewire.com/affiliate-monetization-standards . This doesn’t affect our editorial independence.