CVE-2025-66627
Unknown
Unknown - Not Provided
BaseFortify
Publication date: 2025-12-09
Last updated on: 2025-12-10
Assigner: GitHub, Inc.
Description
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 Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| wasmer | wasmi | 0.51.0 |
| wasmer | wasmi | 0.46.0 |
| wasmer | wasmi | 1.0.0 |
| wasmer | wasmi | 0.44.0 |
| wasmer | wasmi | 0.47.0 |
| wasmer | wasmi | 0.42.0 |
| wasmer | wasmi | 0.41.0 |
| wasmer | wasmi | 0.41.1 |
| wasmer | wasmi | 0.43.0 |
| wasmer | wasmi | 0.50.0 |
| wasmer | wasmi | 0.45.0 |
| wasmi-labs | wasmi | From 0.41.0 (inc) to 0.41.2 (inc) |
| wasmi-labs | wasmi | 1.0.0 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-416 | The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. |
