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CVE-2022-39393

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CVE-2022-39393

Published: Nov 10, 2022

Modified: May 2, 2025

PUBLISHED

CVSS v3.1

8.6

HIGH

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`.

VendorProductVersions

bytecodealliance

wasmtime

affected
>= 2.0.0, < 2.0.2
affected
< 1.0.2

Weaknesses (CWE)

CWE-226

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

References

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