What’s Vulnerable › Vulnerabilities

CVE-2021-28032

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-03-05 · updated 2026-06-17

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.

Affected products

• Nano Arena Project Nano Arena: before 0.5.2 — fixed in 0.5.2

How to fix

Upgrade to a fixed version: Nano Arena Project Nano Arena 0.5.2. Check the vendor advisory for mitigations.

References

• https://rustsec.org/advisories/RUSTSEC-2021-0031.html
• https://rustsec.org/advisories/RUSTSEC-2021-0031.html

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