What’s Vulnerable › Vulnerabilities

CVE-2021-31162

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-14 · updated 2026-06-17
• Weakness: CWE-415

Description

In the standard library in Rust before 1.52.0, a double free can occur in the Vec::from_iter function if freeing the element panics.

Affected products

• Fedoraproject Fedora: 32, 33, 34
• rust-lang rust: from 1.48.0 before 1.52.0 — fixed in 1.52.0

How to fix

Upgrade to a fixed version: rust-lang rust 1.52.0. Check the vendor advisory for mitigations.

References

• https://github.com/rust-lang/rust/issues/83618
• https://github.com/rust-lang/rust/pull/83629
• https://github.com/rust-lang/rust/pull/84603
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CZ337CM4GFJLRDFVQCGC7J25V65JXOG5/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TFUO3URYCO73D2Q4WYJBWAMJWGGVXQO4/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZG65GUW6Z2CYOQHF7T3TB5CZKIX6ZJE/
• https://security.gentoo.org/glsa/202210-09
• https://github.com/rust-lang/rust/issues/83618
• https://github.com/rust-lang/rust/pull/83629
• https://github.com/rust-lang/rust/pull/84603
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CZ337CM4GFJLRDFVQCGC7J25V65JXOG5/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TFUO3URYCO73D2Q4WYJBWAMJWGGVXQO4/

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