{"id":"EUVD-2025-201826","revision":null,"records":[{"revision":"a37cea6a337b4286bb8222f7b3d5ce4e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-66627","aliases":[],"title":"Wasmi's Linear Memory has a Critical Use After Free 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. 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This issue can be triggered by a WebAssembly module under certain memory growth conditions, potentially leading to memory corruption, information disclosure, or code execution.\n\n### Impact\n\n- **Confidentiality:** High – attacker-controlled memory reads possible.\n- **Integrity:** High – memory corruption may allow arbitrary writes.\n- **Availability:** High – interpreter crashes possible.\n\n### Affected Versions\n\nWasmi `v0.41.0` through Wasmi `v1.0.0`.\n\n### Workarounds\n\n- Upgrade to the latest patched version of Wasmi.\n- Consider limiting the maximum linear memory sizes where feasible.\n\n### Credits\n\nThis vulnerability was discovered by **Robert T. 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