An issue was discovered in the nano_arena crate before 0.5.2 for Rust.
Priority MEDIUM 45CWE-416Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-416 and the CVSS impact.
Summary
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.
Why it matters now
EPSS 0.01528 74th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed nano_arena (crates.io): 0.5.2
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | nano_arena (crates.io) | before 0.5.2 | 0.5.2 | Patch available | GHSA-wp34-mqw5-jj85 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- nano_arena (crates.io) Vendor— Affected before 0.5.2 Fixed in 0.5.2 Patch available GHSA-wp34-mqw5-jj85
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:nano_arena_project:nano_arena:*:*:*:*:*:rust:*:* | before 0.5.2 | Vulnerable | Nano Arena Project |
- cpe:2.3:a:nano_arena_project:nano_arena:*:*:*:*:*:rust:*:* Versions before 0.5.2 Vulnerable ·Nano Arena Project
Remediation
- Fix · GHSA-wp34-mqw5-jj85 nano_arena (crates.io) Fixed in 0.5.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-28032
- 2026-10-03 Alias added: GHSA-wp34-mqw5-jj85
References
Sources
- CVE-2021-28032 · CVE Program
- CVE-2021-28032 · NVD
- FIRST EPSS
- GHSA-wp34-mqw5-jj85 · GitHub Advisory Database · CC BY 4.0
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