CVE-2020-35862

Name: CVE-2020-35862
Creator: NVD / NIST
Published: 2020-12-31T10:15:15.05+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.63%

Last modified Jun 17, 2026

CVE-2020-35862 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered in the bitvec crate before 0.17.4 for Rust. BitVec to BitBox conversion leads to a use-after-free or double free.. EPSS estimates a 1.63% chance of exploitation in the next 30 days.

Description

An issue was discovered in the bitvec crate before 0.17.4 for Rust. BitVec to BitBox conversion leads to a use-after-free or double free.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.63%

73.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Bitvec Project	Bitvec	< 0.17.4

References

https://rustsec.org/advisories/RUSTSEC-2020-0007.htmlExploit, Third Party Advisory
https://rustsec.org/advisories/RUSTSEC-2020-0007.htmlExploit, Third Party Advisory

Timeline

Published: Dec 31, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-35862?

An issue was discovered in the bitvec crate before 0.17.4 for Rust. BitVec to BitBox conversion leads to a use-after-free or double free.

How severe is CVE-2020-35862?

CVE-2020-35862 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.63% probability of exploitation in the next 30 days.

How do I fix CVE-2020-35862?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-35862?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST