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Vulnerability record · CVE-2020-36318 · published 11 April 2021

CVE-2020-36318: Rust-lang rust double free vulnerability

Rust Lang · Rust

In the standard library in Rust before 1.49.0, VecDeque::make_contiguous has a bug that pops the same element more than once under certain condition. This bug could result in a use-after-free or double free.

9.8 CVSS 3.1 Critical EPSS 1.7% · top 24.1% CWE-415 · Double freeCWE-416 · Use after free
9.8CVSS 3.1 base score, v2 7.5
1.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

In the standard library in Rust before 1.49.0, VecDeque::make_contiguous has a bug that pops the same element more than once under certain condition. This bug could result in a use-after-free or double free.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/rust-lang/rust/issues/79808 ExploitIssue TrackingPatchThird Party Advisory
https://github.com/rust-lang/rust/pull/79814 PatchThird Party Advisory
https://github.com/rust-lang/rust/issues/79808 ExploitIssue TrackingPatchThird Party Advisory
https://github.com/rust-lang/rust/pull/79814 PatchThird Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-36318), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.