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CVE-2020-35898 — Use after free in actix-utils — CVE Details

CRITICAL

Use after free in actix-utils

Published August 25, 2021Updated May 23, 2025Source: osv

Summary

An issue was discovered in the actix-utils crate before 2.0.0 for Rust. The Cell implementation allows obtaining more than one mutable reference to the same data.

Advisory Timeline

  • First published August 25, 2021 (1874 days ago).
  • Last revised May 23, 2025 — 1367 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Cargo
Update actix-utils to 2.0.0 or later
cargo update -p actix-utils --precise 2.0.0

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: crates.io (1).

PackageEcosystemAffectedFixed In
actix-utils
crates.io
All versions2.0.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.1 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

References

Frequently Asked Questions

What is CVE-2020-35898?
Use after free in actix-utils This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.1/10).
How do I check if my project is affected by CVE-2020-35898?
CVE-2020-35898 affects actix-utils. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2020-35898 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.1

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-hhw2-pqhf-vmx2
RUSTSEC-2020-0045

Related CVEs

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