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CRITICAL

CVE-2021-28879

CVSS v3

9.8

CRITICAL

EPSS Score

2.4 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2021-28879 Red Hat Product Security121 products fixed

    rust: integer overflow in the Zip implementation can lead to a buffer overflow

  • RHSA-2021:3063 Red Hat Product Security67 products fixed

    Red Hat Security Advisory: rust-toolset:rhel8 security, bug fix, and enhancement update

  • RHSA-2021:3042 Red Hat Product Security54 products fixed

    Red Hat Security Advisory: rust-toolset-1.52 and rust-toolset-1.52-rust security and enhancement update

Full record on NVD

Description

In the standard library in Rust before 1.52.0, the Zip implementation can report an incorrect size due to an integer overflow. This bug can lead to a buffer overflow when a consumed Zip iterator is used again.

Technical details

Published
2021-04-11

Frequently asked questions

What is CVE-2021-28879?

In the standard library in Rust before 1.52.0, the Zip implementation can report an incorrect size due to an integer overflow. This bug can lead to a buffer overflow when a consumed Zip iterator is used again.

Is CVE-2021-28879 actively exploited?

Active exploitation of CVE-2021-28879 has not been confirmed. Its EPSS score was 2.4% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-28879?

CVE-2021-28879 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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