CVE-2023-41880 — Wasmtime is a standalone runtime for WebAssembly
Wasmtime is a standalone runtime for WebAssembly. Wasmtime versions from 10.0.0 to versions 10.02, 11.0.2, and 12.0.1 contain a miscompilation of the WebAssembly `i64x2.shr_s` instruction on x86_64 platforms when the shift amount is a constant value that is larger than 32. Only x
Published
2023-09-15T19:43:41.850Z
Last modified
2024-09-24T18:13:31.648Z
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N
01What is this vulnerability?
Wasmtime is a standalone runtime for WebAssembly. Wasmtime versions from 10.0.0 to versions 10.02, 11.0.2, and 12.0.1 contain a miscompilation of the WebAssembly `i64x2.shr_s` instruction on x86_64 platforms when the shift amount is a constant value that is larger than 32. Only x86_64 is affected so all other targets are not affected by this. The miscompilation results in the instruction…
02Affected products
| Vendor | Product | Versions |
|---|
| bytecodealliance | wasmtime | >= 10.0.0, < 10.0.2, >= 11.0.0, < 11.0.2, >= 12.0.0, < 12.0.2 |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:
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07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2023-09-15T19:43:41.850Z
- Last modified: 2024-09-24T18:13:31.648Z
09References
- github.com — https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-gw5p-q8mj-…
- github.com — https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-gw5p-q8mj-…
- github.com — https://github.com/bytecodealliance/wasmtime/pull/6372
- github.com — https://github.com/bytecodealliance/wasmtime/commit/8d7eda15b0badcbea83a7aac2d08…
- docs.rs — https://docs.rs/wasmtime/latest/wasmtime/struct.Config.html#method.wasm_simd
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