CVE-2025-62711 - CVE House

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Status published Low CVE-2025-62711

Wasmtime vulnerable to segfault when using component resources

2.1 CVSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from bytecodealliance

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WebAssembly Micro Runtime frame_offset_bottom array bounds overflow in fast Interpreter mode when handling GET_GLOBAL(I32) followed by if opcode

WebAssembly Micro Runtime vulnerable to a segmentation fault in v128.store instruction

Wasmtime provides unsound API access to a WebAssembly shared linear memory

Wasmtime has memory leak in C API with `externref` and `anyref` types

WAMR runtime hangs or crashes with large memory.fill addresses in LLVM-JIT mode

Affected Vendor

bytecodealliance

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Affected Software

wasmtime

Vulnerable Versions:

>= 38.0.0, < 38.0.3

Timeline

Official Publish: October 24th, 2025

Last Modified: October 27th, 2025

Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application

T1203 Exploitation for Client Execution

T1213 Data from Information Repositories

T1499 Endpoint Denial of Service