CVE-2025-66627
Last modified
CVE-2025-66627 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.13% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Wasmi-Labs | Wasmi | >= 0.41.0, < 0.41.2 |
| Wasmi-Labs | Wasmi | >= 0.47.0, < 0.47.1 |
| Wasmi-Labs | Wasmi | >= 0.51.0, < 0.51.3 |
| Wasmi-Labs | Wasmi | 1.0.0 |
References
- https://github.com/wasmi-labs/wasmi/security/advisories/GHSA-g4v2-cjqp-rfmqPatch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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