Wasmtime segfault or unused out-of-sandbox load with `f64x2.splat` operator on x86-64 (bytecodealliance wasmtime)
En bref
- Source
- NVD
- EPSS
- EPSS 0.23 % · centile 14 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- GitHub_M
- Statut NVD
- Analyzed
Description
Wasmtime is a runtime for WebAssembly. Prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1, On x86-64 platforms with SSE3 disabled Wasmtime's compilation of the f64x2.splat WebAssembly instruction with Cranelift may load 8 more bytes than is necessary. When signals-based-traps are disabled this can result in a uncaught segfault due to loading from unmapped guard pages. With guard pages disabled it's possible for out-of-sandbox data to be loaded, but this data is not visible to WebAssembly guests. This vulnerability is fixed in 24.0.7, 36.0.7, 42.0.2, and 43.0.1.
Faiblesses (CWE)
- CWE-248 — Exception non interceptée
Références
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 4.0 | MEDIUM 4.1 | CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | GitHub_M |
| CVSS 4.0 | MEDIUM 4.1 | CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | MEDIUM 5.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
Références européennes
- ENISA EUVD · EUVD-2026-21023
- GCVE · GCVE-0-2026-34944
Configurations affectées (CPE NVD)
cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:rust:*:*< 24.0.7cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:rust:*:*≥ 25.0.0 < 36.0.7cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:rust:*:*≥ 37.0.0 < 42.0.2cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:rust:*:*≥ 43.0.0 < 43.0.1
Produits affectés
| Produit | Versions |
|---|---|
| bytecodealliance · wasmtime | affected < 24.0.7 ; affected >= 25.0.0, < 36.0.7 ; affected >= 37.0.0, < 42.0.2 ; affected >= 43.0.0, < 44.0.1 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |