CVE-2021-26307: Raw-Cpuid Project Raw-Cpuid

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

An issue was discovered in the raw-cpuid crate before 9.0.0 for Rust. It allows __cpuid_count() calls even if the processor does not support the CPUID instruction, which is unsound and causes a deterministic crash.

Affected products

• Raw-Cpuid Project Raw-Cpuid: before 9.0.0 (fixed in 9.0.0)

Published 2021-01-29. Last modified 2026-06-17.