RustCrypto/utils

RustCrypto/utils

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Utility crates used in RustCrypto
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CVE History

CVEPublishedCVSS v3CVSS v2
CVE-2026-23519↗
9.8 CRITICAL—

RustCrypto CMOV provides conditional move CPU intrinsics which are guaranteed on major platforms to execute in constant-time and not be rewritten as branches by the compiler. Prior to 0.4.4, the thumbv6m-none-eabi (Cortex M0, M0+ and M1) compiler emits non-constant time assembly when using cmovnz (portable version). This vulnerability is fixed in 0.4.4.