Is CVE-2022-39393 actively exploited?

CVE-2022-39393 has no public evidence of in-the-wild exploitation as of 2025-05-02.

What is the CVSS score for CVE-2022-39393?

CVE-2022-39393 has a CVSS score of 8.6 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.

How do I patch CVE-2022-39393?

Patch guidance is available from bytecodealliance security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2022-39393.

Fix CVE-2022-39393 - HIGH bytecodealliance wasmtime

Q: Which products are affected by CVE-2022-39393?

2 products: bytecodealliance wasmtime, bytecodealliance wasmtime.

Description

Wasmtime is a standalone runtime for WebAssembly. Prior to versions 2.0.2 and 1.0.2, there is a 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. This bug has been patched and users should upgrade to Wasmtime 2.0.2 and 1.0.2. Other mitigations include disabling the pooling allocator and disabling the `memory-init-cow`.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: changed
Confidentiality: high
Integrity: none
Availability: none
Weaknesses: CWE-226 CWE-212

Metadata

Primary Vendor: BYTECODEALLIANCE
Published: 11/10/2022
Last Modified: 5/2/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

bytecodealliance : wasmtimebytecodealliance : wasmtime

Remediation Guidance

Executive Summary

Cite this page

CVE-2022-39393. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2022-39393

View on NIST NVD

CVE-2022-39393 vulnerability