CVE-2020-35862

CRITICALNVD 9.89.8—

9.8

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.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 66.7%
KEV: Not listed

Published

December 31, 2020

Last Modified

November 21, 2024

Advisory Details (1)

Auto-updated May 26, 2026

No patch confirmed yet.

generic

RUSTSEC-2020-0007: bitvec: use-after or double free of allocated memory › RustSec Advisory Database

https://rustsec.org/advisories/RUSTSEC-2020-0007.html

Affected Packages

(1 across 1 ecosystem)

crates.io(1)

Package	Vulnerable range	Fixed in	Dependents
bitvec	—	0.17.4	—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 17× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 22:45 UTCEG score recompute
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2020-35862?

CVE-2020-35862 is a critical vulnerability published on December 31, 2020. 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.

When was CVE-2020-35862 disclosed?

CVE-2020-35862 was first published in the National Vulnerability Database on December 31, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-35862 actively exploited?

CVE-2020-35862 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 66.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-35862?

CVE-2020-35862 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2020-35862?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-35862, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-35862

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CVE-2020-35862

📅 Published

🔄 Last Modified

📋 Advisory Details (1)