What’s Vulnerable › Vulnerabilities

CVE-2021-28875

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-11 · updated 2026-06-17
• Weakness: CWE-252

Description

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.

Affected products

• rust-lang rust: before 1.50.0 — fixed in 1.50.0

How to fix

Upgrade to a fixed version: rust-lang rust 1.50.0. Check the vendor advisory for mitigations.

References

• https://github.com/rust-lang/rust/issues/80894
• https://github.com/rust-lang/rust/pull/80895
• https://security.gentoo.org/glsa/202210-09
• https://github.com/rust-lang/rust/issues/80894
• https://github.com/rust-lang/rust/pull/80895
• https://security.gentoo.org/glsa/202210-09

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