Reliance on Undefined, Unspecified, or Implementation-Defined Behavior Affecting cmov package, versions >=0.1.1 <0.5.4
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RUST-CMOV-17808103
- published3 Jul 2026
- disclosed2 Jul 2026
- creditUnknown
Introduced: 2 Jul 2026
NewCVE-2026-50185 (opens in a new tab)How to fix?
Upgrade cmov to version 0.5.4 or higher.
Overview
Affected versions of this package are vulnerable to Reliance on Undefined, Unspecified, or Implementation-Defined Behavior in the Cmov and CmovEq implementations on aarch64 architectures when high bits of registers are set. An attacker can cause incorrect computation results by providing crafted input values that exploit the undefined upper bits during inline assembly operations.