CVE-2021-28875

HIGHNVD 7.57.5—

7.5

In the standard library in Rust before 1.50.0, read_to_end() does not validate the return value from Read in an unsafe context. This bug could lead to a buffer overflow.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 61.9%
KEV: Not listed

Published

April 11, 2021

Last Modified

November 21, 2024

References (6)

cve@mitrehttps://github.com/rust-lang/rust/issues/80894
cve@mitrehttps://github.com/rust-lang/rust/pull/80895
cve@mitrehttps://security.gentoo.org/glsa/202210-09
af854a3a-2127-422b-91ae-364da2661108https://github.com/rust-lang/rust/issues/80894
af854a3a-2127-422b-91ae-364da2661108https://github.com/rust-lang/rust/pull/80895
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202210-09

Patch Availability(2)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
redhat	rust-toolset:rhel8-8040020210603202531.2daa1a95	2021-08-10	redhat
redhat	rust-toolset-1.52-rust-0:1.52.1-2.el7_9	2021-08-10	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-252Unchecked Return Value

All Vendor Advisories

(3)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 8× in last 7d / 8× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 18:30 UTCEG score recompute
2026-05-26 18:30 UTCVendor advisory
2026-05-26 18:30 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2021-28875?

CVE-2021-28875 is a high vulnerability published on April 11, 2021. In the standard library in Rust before 1.50.0, readtoend() does not validate the return value from Read in an unsafe context. This bug could lead to a buffer overflow.

When was CVE-2021-28875 disclosed?

CVE-2021-28875 was first published in the National Vulnerability Database on April 11, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-28875 actively exploited?

CVE-2021-28875 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 61.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-28875?

CVE-2021-28875 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-28875?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-28875, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-28875

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