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Vulnerability record · CVE-2015-20001 · published 11 April 2021

CVE-2015-20001: Rust-lang rust memory buffer overflow vulnerability

Rust Lang · Rust

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.

7.5 CVSS 3.1 High EPSS 1.3% · top 30.2% CWE-119 · Memory buffer overflow
7.5CVSS 3.1 base score, v2 5.0
1.3%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 1.2.0, 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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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/25842 ExploitIssue TrackingPatchThird Party Advisory
https://github.com/rust-lang/rust/pull/25856 Issue TrackingPatchThird Party Advisory
https://github.com/rust-lang/rust/issues/25842 ExploitIssue TrackingPatchThird Party Advisory
https://github.com/rust-lang/rust/pull/25856 Issue TrackingPatchThird 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-2015-20001), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.