CVE-2022-31169 json
Cranelift vulnerable to miscompilation of constant values in division on AArch64
published 2022-07-21 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-6282
- cvss
- 5.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 60%
- public exploits
- 0
- none known
Summary
Wasmtime is a standalone runtime for WebAssembly. There is a bug in Wasmtime's code generator, Cranelift, for AArch64 targets where constant divisors can result in incorrect division results at runtime. This affects Wasmtime prior to version 0.38.2 and Cranelift prior to 0.85.2. This issue only affects the AArch64 platform. Other platforms are not affected. The translation rules for constants did not take into account whether sign or zero-extension should happen which resulted in an incorrect value being placed into a register when a division was encountered. The impact of this bug is that programs executing within the WebAssembly sandbox would not behave according to the WebAssembly specification. This means that it is hypothetically possible for execution within the sandbox to go awry and WebAssembly programs could produce unexpected results. This should not impact hosts executing WebAssembly but does affect the correctness of guest programs. This bug has been patched in Wasmtime version 0.38.2 and cranelift-codegen 0.85.2. There are no known workarounds.
Patch / fix
- bytecodealliance cranelift-codegen 0.85.1
- bytecodealliance wasmtime 0.38.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 18 mo ago
Exploit prediction
0.92% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
Affected products
- bytecodealliance wasmtime
Classification
- Weakness
-
- CWE-682 Incorrect Calculation
References
-
github.com
/bytecodealliance/wasmtime/commit/2ba4bce5cc719e5a74e571a534424614e62ecc41
patch, third-party-advisory
-
github.com
/bytecodealliance/wasmtime/security/advisories/GHSA-7f6x-jwh5-m9r4
third-party-advisory
Sources
- CVE List CVE-2022-31169
- NVD CVE-2022-31169
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