CVE-2020-36318

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-04-11 · updated 2026-06-17
Weakness: CWE-415

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.

Affected products

rust-lang rust: from 1.48.0 before 1.49.0 — fixed in 1.49.0

How to fix

Upgrade to a fixed version: rust-lang rust 1.49.0. Check the vendor advisory for mitigations.

References

https://github.com/rust-lang/rust/issues/79808
https://github.com/rust-lang/rust/pull/79814
https://github.com/rust-lang/rust/issues/79808
https://github.com/rust-lang/rust/pull/79814

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