CVE-2015-20001

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-04-11 · updated 2026-06-17
Weakness: CWE-119

Description

In the standard library in Rust before 1.2.0, BinaryHeap is not panic-safe. The binary heap is left in an inconsistent state when the comparison of generic elements inside sift_up or sift_down_range panics. This bug leads to a drop of zeroed memory as an arbitrary type, which can result in a memory safety violation.

Affected products

rust-lang rust: before 1.2.0 — fixed in 1.2.0

How to fix

Upgrade to a fixed version: rust-lang rust 1.2.0. Check the vendor advisory for mitigations.

References

https://github.com/rust-lang/rust/issues/25842
https://github.com/rust-lang/rust/pull/25856
https://github.com/rust-lang/rust/issues/25842
https://github.com/rust-lang/rust/pull/25856

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