{"id":"RUSTSEC-2022-0097","revision":null,"records":[{"revision":"a712db5946314c4ba286d7b3c3d9f338","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2022-39394","aliases":[],"title":"wasmtime_trap_code C API function has out of bounds write vulnerability","description":"Wasmtime is a standalone runtime for WebAssembly. Prior to version 2.0.2, there is a bug in Wasmtime's C API implementation where the definition of the `wasmtime_trap_code` does not match its declared signature in the `wasmtime/trap.h` header file. This discrepancy causes the function implementation to perform a 4-byte write into a 1-byte buffer provided by the caller. This can lead to three zero bytes being written beyond the 1-byte location provided by the caller. This bug has been patched and users should upgrade to Wasmtime 2.0.2. This bug can be worked around by providing a 4-byte buffer casted to a 1-byte buffer when calling `wasmtime_trap_code`. 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This can lead to three zero bytes being written beyond the 1-byte location provided by the caller.\n\n### Patches\n\nThis bug has been patched and users should upgrade to Wasmtime 2.0.2.\n\n### Workarounds\n\nThis can be worked around by providing a 4-byte buffer casted to a 1-byte buffer when calling `wasmtime_trap_code`. Users of the `wasmtime` crate are not affected by this issue, only users of the C API function `wasmtime_trap_code` are affected.\n\n### References\n\n* [Definition of `wasmtime_trap_code`](https://docs.wasmtime.dev/c-api/trap_8h.html#a6580f4f209d3eaebb6e8b9a901a30b7a)\n* [Mailing list announcement](https://groups.google.com/a/bytecodealliance.org/g/sec-announce/c/c1HBDDJwNPA)\n* [Patch to fix for `main` branch](https://github.com/bytecodealliance/wasmtime/commit/5b6d5e78de106503b3b9add218bb3d2b1d63c493)\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\n* Reach out to us on [the Bytecode Alliance Zulip chat](https://bytecodealliance.zulipchat.com/#narrow/stream/217126-wasmtime)\n* Open an issue in [the bytecodealliance/wasmtime repository](https://github.com/bytecodealliance/wasmtime/)","state":0,"publishedAt":"2024-02-01T00:15:47+00:00","modifiedAt":"2025-05-02T12:51:45+00:00","affected":[{"ecosystem":"crates.io","name":"wasmtime","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"2.0.0"},{"kind":"fixed","version":"2.0.2"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"crates.io","name":"wasmtime","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.0.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"LOW"}],"references":["https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-h84q-m8rr-3v9q","https://nvd.nist.gov/vuln/detail/CVE-2022-39394","https://github.com/bytecodealliance/wasmtime/commit/087d9d7becf7422b3f872a3bcd5d97bb7ce7ff36","https://github.com/bytecodealliance/wasmtime/commit/5b6d5e78de106503b3b9add218bb3d2b1d63c493","https://github.com/bytecodealliance/wasmtime","https://groups.google.com/a/bytecodealliance.org/g/sec-announce/c/c1HBDDJwNPA","https://rustsec.org/advisories/RUSTSEC-2022-0097.html"],"sourceUrl":"https://github.com/advisories/GHSA-h84q-m8rr-3v9q","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-h84q-m8rr-3v9q","identifiers":["GHSA-h84q-m8rr-3v9q","CVE-2022-39394","RUSTSEC-2022-0097"]},"retained":false,"historicalAffected":[]},{"revision":"98a4c5a3b50840f08061fa096f575fb6","observedAt":"2026-10-24T13:19:54.901+00:00","statement":{"source":"osv","id":"RUSTSEC-2022-0097","aliases":["CVE-2022-39394","GHSA-h84q-m8rr-3v9q"],"title":"Out of bounds write in `wasmtime_trap_code` C API function","description":"This is an entry in the RustSec database for the Wasmtime security advisory\nlocated at\nhttps://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-h84q-m8rr-3v9q.\nFor more information see the GitHub-hosted security advisory.","state":0,"publishedAt":"2022-11-07T12:00:00+00:00","modifiedAt":"2026-10-12T18:00:06.1124728+00:00","affected":[{"ecosystem":"crates.io","name":"wasmtime","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.0.0-0"},{"kind":"fixed","version":"1.0.2"},{"kind":"introduced","version":"2.0.0"},{"kind":"fixed","version":"2.0.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L","score":null,"severity":null}],"references":["https://crates.io/crates/wasmtime","https://rustsec.org/advisories/RUSTSEC-2022-0097.html","https://github.com/bytecodealliance/wasmtime/commit/087d9d7becf7422b3f872a3bcd5d97bb7ce7ff36"],"sourceUrl":"https://osv.dev/vulnerability/RUSTSEC-2022-0097","license":"OSV · upstream source license applies","key":"osv:RUSTSEC-2022-0097","identifiers":["RUSTSEC-2022-0097","CVE-2022-39394","GHSA-h84q-m8rr-3v9q"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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