Answer in brief
CVE-2022-39393 records a High severity (CVSS 8.6) vulnerability in Data leakage between instances in the pooling allocator. The current sources do not mark it as known exploited. The current feed maps wasmtime (crates.io). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps wasmtime (crates.io). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| wasmtimecrates.io | >=0.0.0-0 <1.0.2 >=2.0.0 <2.0.2 | 1.0.2, 2.0.2 |
Published upstream
Nov 5, 2022
Evidence: source:osv:source_dates:source-dates:recordSource modified
Oct 12, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Oct 12, 2026
bug in Wasmtime's 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. Mitigations are described [here](https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-wh6w-3828-g9qf).
Quoted source text, attributed separately from HOL analysis.