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Vulnerability record · CVE-2021-28877 · published 11 April 2021

CVE-2021-28877: Rust-lang rust memory buffer overflow vulnerability

Rust Lang · Rust

In the standard library in Rust before 1.51.0, the Zip implementation calls __iterator_get_unchecked() for the same index more than once when nested. This bug can lead to a memory safety violation due to an unmet safety requirement for the TrustedRandomAccess trait.

7.5 CVSS 3.1 High EPSS 1.4% · top 28.8% CWE-119 · Memory buffer overflow
7.5CVSS 3.1 base score, v2 5.0
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

In the standard library in Rust before 1.51.0, the Zip implementation calls __iterator_get_unchecked() for the same index more than once when nested. This bug can lead to a memory safety violation due to an unmet safety requirement for the TrustedRandomAccess trait.

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/pull/80670 Issue TrackingPatchThird Party Advisory
https://security.gentoo.org/glsa/202210-09 Third Party Advisory
https://github.com/rust-lang/rust/pull/80670 Issue TrackingPatchThird Party Advisory
https://security.gentoo.org/glsa/202210-09 Third 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-2021-28877), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.