{"id":"EUVD-2022-7455","enisaUuid":"cd17b384-b605-31c2-b9ce-597b06881fd5","description":"Wasmtime is a standalone runtime for WebAssembly. Prior to versions 2.0.2 and 1.0.2, there is a bug in Wasmtime\u0027s implementation of its pooling instance allocator where when a linear memory is reused for another instance the initial heap snapshot of the prior instance can be visible, erroneously to the next instance. This bug has been patched and users should upgrade to Wasmtime 2.0.2 and 1.0.2. Other mitigations include disabling the pooling allocator and disabling the `memory-init-cow`.","datePublished":"Nov 10, 2022, 12:00:00 AM","dateUpdated":"May 2, 2025, 12:51:28 PM","baseScore":8.6,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","references":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-wh6w-3828-g9qf\nhttps://github.com/bytecodealliance/wasmtime/commit/2614f2e9d2d36805ead8a8da0fa0c6e0d9e428a0\n","aliases":"CVE-2022-39393\nGHSA-wh6w-3828-g9qf\n","assigner":"GitHub_M","epss":0.75,"enisaIdProduct":[{"id":"2df31cd1-a0e2-32f1-bf80-53f8d765970a","product":{"name":"wasmtime","vendor":{"name":"bytecodealliance"}},"product_version":"\u003c 1.0.2"},{"id":"92b5050f-e4af-381c-a91a-8d68e417b82e","product":{"name":"wasmtime","vendor":{"name":"bytecodealliance"}},"product_version":"\u003c 2.0.2"},{"id":"bd3c69ab-d031-399d-95b8-c4586b07f33b","product":{"name":"wasmtime","vendor":{"name":"bytecodealliance"}},"product_version":"2.0.0, \u003c 2.0.2"}],"enisaIdVendor":[{"id":"f6b46009-9f45-300e-9cf4-d388806685b5","vendor":{"name":"bytecodealliance"}}],"enisaIdVulnerability":[{"id":"94b5f615-7aba-38be-b4b4-baeacdda9d23","vulnerability":{"id":"CVE-2022-39393","description":"Wasmtime is a standalone runtime for WebAssembly. Prior to versions 2.0.2 and 1.0.2, there is a bug in Wasmtime\u0027s implementation of its pooling instance allocator where when a linear memory is reused for another instance the initial heap snapshot of the prior instance can be visible, erroneously to the next instance. This bug has been patched and users should upgrade to Wasmtime 2.0.2 and 1.0.2. Other mitigations include disabling the pooling allocator and disabling the `memory-init-cow`.","datePublished":"Nov 10, 2022, 12:00:00 AM","dateUpdated":"May 2, 2025, 12:51:28 PM","status":"PUBLISHED","baseScore":8.6,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N","references":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-wh6w-3828-g9qf\nhttps://github.com/bytecodealliance/wasmtime/commit/2614f2e9d2d36805ead8a8da0fa0c6e0d9e428a0\n","enisa_id":"EUVD-2022-7455\n","assigner":"GitHub_M","epss":0.75,"dataProcessed":"Oct 30, 2026, 7:14:51 AM","vulnerabilityProduct":[{"id":"3323b24e-3b46-3e5c-b59d-70f39b0f025e","product":{"name":"wasmtime","vendor":{"name":"bytecodealliance"}},"product_version":"2.0.0, \u003c 2.0.2"},{"id":"6661618b-ddc0-4a53-aaaa-dd438b8a124a","product":{"name":"wasmtime","vendor":{"name":"bytecodealliance"}},"product_version":"\u003c 1.0.2"},{"id":"8a6f6a3d-c937-425d-815a-b11086dbcba1","product":{"name":"wasmtime","vendor":{"name":"bytecodealliance"}},"product_version":"2.0.0, \u003c 2.0.2"},{"id":"b5d1fce6-41b3-32d2-a75e-3d7d435c835a","product":{"name":"wasmtime","vendor":{"name":"bytecodealliance"}},"product_version":"\u003c 1.0.2"},{"id":"eb0f428a-d743-3dc7-8acf-c9e80ec9abb2","product":{"name":"wasmtime","vendor":{"name":"bytecodealliance"}},"product_version":"\u003c 2.0.2"}],"vulnerabilityVendor":[{"id":"a29ffdea-917c-341b-b651-bbef459fef46","vendor":{"name":"bytecodealliance"}}]}},{"id":"d314aa71-87c3-3f55-9bce-6a46e8ea73f6","vulnerability":{"id":"GHSA-wh6w-3828-g9qf","description":"Wasmtime may have data leakage between instances in the pooling allocator","datePublished":"Nov 10, 2022, 9:16:22 PM","dateUpdated":"May 2, 2025, 12:51:03 PM","baseScore":0.0,"references":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-wh6w-3828-g9qf\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-39393\nhttps://github.com/bytecodealliance/wasmtime/commit/2614f2e9d2d36805ead8a8da0fa0c6e0d9e428a0\nhttps://github.com/bytecodealliance/wasmtime/commit/3535acbf3be032ef1ba0b469b8ab92538a8a18a6\nhttps://github.com/bytecodealliance/wasmtime\nhttps://groups.google.com/a/bytecodealliance.org/g/sec-announce/c/c1HBDDJwNPA\nhttps://rustsec.org/advisories/RUSTSEC-2022-0075.html\nhttps://rustsec.org/advisories/RUSTSEC-2022-0098.html\n","enisa_id":"EUVD-2022-7455\n","aliases":"GHSA-wh6w-3828-g9qf\nCVE-2022-39393\n","epss":0.0,"dataProcessed":"May 3, 2026, 2:05:52 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}}],"enisaIdAdvisory":[]}