# Microsoft researchers report memory safety flaws in Rust's standard library

_Published Sunday, November 15, 2026 at 3:18 AM EST · Security · Latest · Tier 2 — Notable_

![Colorful FORGE lettering beside an ink-and-wash painting of an artisan forging glowing metal. — Primary](https://forge-blog.github.io/images/forge.png)

Microsoft's FORGE Lab reported memory safety bugs in Rust's standard library, including cases where programs written entirely in safe Rust can trigger undefined behavior. Researchers said they reproduced the bugs and worked with Rust maintainers on fixes, using the AI-assisted Hyenas scanning system for some findings.

One Unix flaw lets concurrent operations that replace a process alter shared environment data under a read lock, potentially leaving a pointer to freed memory. A fix that avoids modifying the shared environment is in review.

Other findings involve panic handling and assumptions about user-provided code. For a separate signal-stack flaw, researchers found no reliable exploitation path under the conditions tested and assessed practical exploitation as unlikely.

## Sources

- [forge-blog.github.io](https://forge-blog.github.io/posts/rust-std-memory-safety/)

---
Canonical: https://techandbusiness.org/newswire/wNsDwMYgLcipP4CgjZb2pn
Published: 2026-11-15T08:18:15.440Z
Story chronology: 2026-11-13T05:22:08.000Z
Retrieved: 2026-11-15T23:01:24.392Z
Publisher: Tech & Business (techandbusiness.org)