CVE-2025-62711

LOW

Bytecodealliance Wasmtime < 38.0.3 - Improper Exception Handling

Title source: rule

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.

References (3)

[Patch, Third Party Advisory] https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-4h67-722j-5pmc

[Patch] https://github.com/bytecodealliance/wasmtime/pull/11592

[Patch] https://github.com/bytecodealliance/wasmtime/commit/192f2fcdadfec9d0cf6b58548a85a7307450cbf5

View Patch ZIP pw:eip

Scores

CVSS v3 3.1

EPSS 0.0001

EPSS Percentile 1.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-755

Status published

Products (2)

bytecodealliance/wasmtime 38.0.0 - 38.0.3

crates.io/wasmtime 38.0.0 - 38.0.3crates.io

Published Oct 24, 2025

Tracked Since Feb 18, 2026