bytecodealliance wasmtime up to 38.0.2 exceptional condition

Summaryinfo

A vulnerability was found in bytecodealliance wasmtime up to 38.0.2. It has been rated as problematic. This issue affects some unknown processing. The manipulation leads to exceptional condition. This vulnerability is documented as CVE-2025-62711. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in bytecodealliance wasmtime up to 38.0.2. This issue affects an unknown function. The manipulation with an unknown input leads to a exceptional condition vulnerability. Using CWE to declare the problem leads to CWE-755. The product does not handle or incorrectly handles an exceptional condition. Impacted is availability. The summary by CVE is:

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.

The weakness was released by SegFault as GHSA-4h67-722j-5pmc. The advisory is shared at github.com. The identification of this vulnerability is CVE-2025-62711 since 10/20/2025. The exploitation is known to be difficult. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 271864 (Linux Distros Unpatched Vulnerability : CVE-2025-62711), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 38.0.3 eliminates this vulnerability. Applying the patch 192f2fcdadfec9d0cf6b58548a85a7307450cbf5 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (271864). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• bytecodealliance

Name

• wasmtime

Version

• 38.0.0
• 38.0.1
• 38.0.2

License

• open-source

Website

• Product: https://github.com/bytecodealliance/wasmtime/

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CPE 2.2info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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