UNKNOWN WRITE vulnerability in wasmtime

wasmtime Updated 02 Oct 2025

Summary

08/11/2022

Disclosed on

HIGH

Severity

Yes i

Fix available

High

Severity

Not published

CVSS Score

OSV-2022-1155: UNKNOWN WRITE in wasmtime_fuzzing::oracles::instantiate_many::h1a28dda90c13f877. Affects wasmtime versions >= d3a6181939015eabd30d0c154b1cf2922e9dc4ba, < dece901d1694bd5f148b67afc9a512e4cc344591. Fixed in dece901d1694bd5f148b67afc9a512e4cc344591. How to fix ↓

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Background

wasmtime is an open-source runtime for WebAssembly and WASI (WebAssembly System Interface). It allows executing WebAssembly modules in a safe and efficient manner. The runtime provides a set of APIs and tools for working with WebAssembly code. However, a vulnerability has been discovered in wasmtime that could lead to an UNKNOWN WRITE crash.

Vulnerability Detail

The vulnerability, identified as OSV-2022-1155, occurs in the wasmtime_fuzzing::oracles::instantiate_many::h1a28dda90c13f877 function. It is categorized as a HIGH severity issue. The exact cause and impact of the vulnerability are not specified in the provided information. However, it is mentioned that the crash state occurs in the instantiate_many::_::run::he4646225c064edb2 function.

How To Fix

Minimum fixed version

dece901d1694bd5f148b67afc9a512e4cc344591

This is the first release that contains the fix.

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Workaround

No specific workaround is mentioned in the provided information.

Conclusion

In conclusion, the UNKNOWN WRITE vulnerability in wasmtime could lead to a crash in the instantiate_many::run function. It is recommended to update the wasmtime package to a fixed version to mitigate this vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.

See every vulnerability recorded for wasmtime →