Vulnerability Description
Wasmi is a WebAssembly interpreter focused on constrained and embedded systems. In versions 0.41.0, 0.41.1, 0.42.0 through 0.47.1, 0.50.0 through 0.51.2 and 1.0.0, Wasmi's linear memory implementation leads to a Use After Free vulnerability, triggered by a WebAssembly module under certain memory growth conditions. This issue potentially leads to memory corruption, information disclosure, or code execution. This issue is fixed in versions 0.41.2, 0.47.1, 0.51.3 and 1.0.1. To workaround this issue, consider limiting the maximum linear memory sizes where feasible.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Wasmi-Labs | Wasmi | >= 0.41.0, < 0.41.2 |
Related Weaknesses (CWE)
References
- https://github.com/wasmi-labs/wasmi/security/advisories/GHSA-g4v2-cjqp-rfmqPatchVendor Advisory
FAQ
What is CVE-2025-66627?
CVE-2025-66627 is a vulnerability with a CVSS score of 8.4 (HIGH). Wasmi is a WebAssembly interpreter focused on constrained and embedded systems. In versions 0.41.0, 0.41.1, 0.42.0 through 0.47.1, 0.50.0 through 0.51.2 and 1.0.0, Wasmi's linear memory implementation...
How severe is CVE-2025-66627?
CVE-2025-66627 has been rated HIGH with a CVSS base score of 8.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-66627?
Check the references section above for vendor advisories and patch information. Affected products include: Wasmi-Labs Wasmi.