CVE-2021-28032

CRITICAL 9.8CVE-2021-28032 · Published 05/03/2021 · updated 17/06/2026

In short

CVE-2021-28032 is a CRITICAL (CVSS 9.8) vulnerability affecting nano arena (nano arena project).
Chance of exploitation in the next 30 days (EPSS): 1.5%, higher than 74.9% of all vulnerabilities.
Fix: update to 0.5.2 or later.

Package	Affected versions	Patched versions
nano arena nano_arena_project	`< 0.5.2`	`0.5.2`

Description

An issue was discovered in the nano_arena crate before 0.5.2 for Rust. There is an aliasing violation in split_at because two mutable references can exist for the same element, if Borrow<Idx> behaves in certain ways. This can have a resultant out-of-bounds write or use-after-free.

References

rustsec.org/advisories/RUSTSEC-2021-0031.html · Exploit

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