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.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 24 Oct 2025 22:00:00 +0000

Type Values Removed Values Added
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.
Title Wasmtime vulnerable to segfault when using component resources
Weaknesses CWE-755
References
Metrics cvssV4_0

{'score': 2.1, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-10-24T21:54:52.578Z

Reserved: 2025-10-20T19:41:22.740Z

Link: CVE-2025-62711

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2025-10-24T22:15:49.850

Modified: 2025-10-24T22:15:49.850

Link: CVE-2025-62711

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.