# CVE-2026-50185

## Summary

- **CVE ID:** CVE-2026-50185
- **Severity:** LOW
- **CVSS Score:** 2 (CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-758
- **Published:** Jul 17, 2026
- **Last Modified:** Jul 20, 2026

## 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.

## Affected Products

- RustCrypto — utils (>= 0.1.1, < 0.5.4)

## References

- [CNA](https://github.com/RustCrypto/utils/security/advisories/GHSA-3rjw-m598-pq24)
- [CNA](https://github.com/RustCrypto/utils/commit/dba6c355c9f241e3726d5ec2a68f9f3b519f6063)
- [CNA](https://github.com/RustCrypto/utils/releases/tag/cmov-v0.5.4)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.16%
- **EPSS Percentile:** 5.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._