CVE-2025-62711
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-24

Last updated on: 2025-11-03

Assigner: GitHub, Inc.

Description
Wasmtime is a runtime for WebAssembly. In versions from 38.0.0 to before 38.0.3, the implementation of component-model related host-to-wasm trampolines in Wasmtime contained a bug where it's possible to carefully craft a component, which when called in a specific way, would crash the host with a segfault or assert failure. Wasmtime 38.0.3 has been released and is patched to fix this issue. There are no workarounds.
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Meta Information
Published
2025-10-24
Last Modified
2025-11-03
Generated
2026-06-16
AI Q&A
2025-10-25
EPSS Evaluated
2026-06-15
NVD
CVE-2025-62711
EUVD
EUVD-2025-35897
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
bytecodealliance wasmtime From 38.0.0 (inc) to 38.0.3 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-755 The product does not handle or incorrectly handles an exceptional condition.
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Executive Summary

This vulnerability in Wasmtime versions 38.0.0 to before 38.0.3 involves a bug in the implementation of component-model related host-to-wasm trampolines. A specially crafted component, when called in a specific way, can cause the host to crash with a segmentation fault or an assertion failure. The issue has been fixed in Wasmtime 38.0.3.

Impact Analysis

The vulnerability can cause the host running Wasmtime to crash unexpectedly due to a segmentation fault or assertion failure. This could lead to denial of service or instability in applications relying on Wasmtime for WebAssembly execution.

Mitigation Strategies

Upgrade Wasmtime to version 38.0.3 or later, as this version contains the patch that fixes the vulnerability. There are no workarounds available.

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