CVE-2025-66627
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Wasmi's Linear Memory has a Critical Use After Free Vulnerability
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
wasmi
- Vendor
- wasmi-labs
- Product
- wasmi
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| >= 0.41.0, < 0.41.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 0.42.0, < 0.47.1 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 0.50.0, < 0.51.3 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 1.0.0, < 1.0.1 | affected | Unavailable | Unavailable | Unavailable | None listed |