---
id: CVE-2025-64345
aliases:
  - RUSTSEC-2025-0118
  - GHSA-hc7m-r6v8-hg9q
title: Unsound API access to a WebAssembly shared linear memory
summary: Unsound API access to a WebAssembly shared linear memory
severity: low
cvss: 1.8
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N'
vendor: wasmtime
product: wasmtime
ecosystem: rust
affected:
  - 'wasmtime >= 38.0.0, < 38.0.4'
patched:
  - wasmtime 38.0.4
published: '2025-11-11'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T18:00:07.413203425Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/RUSTSEC-2025-0118'
references:
  - url: 'https://crates.io/crates/wasmtime'
  - url: 'https://rustsec.org/advisories/RUSTSEC-2025-0118.html'
  - url: >-
      https://github.com/bytecodealliance/wasmtime/commit/9ebb6934f00d58b92fb68ed0e0b16c0ae828ca10
tags:
  - osv
  - rust
epss: 0.00108
epssPercentile: 0.01132
ingestedAt: '2026-10-13T11:45:30.181Z'
---

## Overview

This is an entry in the RustSec database for the Wasmtime security advisory
located at
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hc7m-r6v8-hg9q
For more information see the GitHub-hosted security advisory.

## Affected packages

- `wasmtime >= 38.0.0, < 38.0.4`

## Remediation

Upgrade to a patched release:

- `wasmtime 38.0.4`