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Low severity3.3NVD Advisory· Published Jul 17, 2026· Updated Aug 18, 2026

CVE-2026-50185

CVE-2026-50185

Description

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. From 0.1.1 until 0.5.4, the aarch64 implementations of Cmov and CmovEq in cmov/src/backends/aarch64.rs assume high bits are zero-extended when loading values smaller than a register, so set high bits such as [8..] in a Cmov selector or [16..] of self or other in the u16 and i16 CmovEq implementations can cause left.cmovz(&right, condition) to produce incorrect output. This issue is fixed in version 0.5.4.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
cmovcrates.io
>= 0.1.1, < 0.5.40.5.4

Affected products

13

Patches

Vulnerability mechanics

References

4

News mentions

0

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