Vulnerability CVE-2025-62711: Information

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.

Severity: LOW (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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Severity: LOW (3.1)

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

URL: https://nvd.nist.gov/vuln/detail/CVE-2025-62711

Published: Oct. 24, 2025

Modified: Nov. 3, 2025

Error type identifier: CWE-755

Fixed packages

Package name	Branch	Fixed in version	Version from repository	Errata ID	Task #	State
wasmtime	sisyphus	43.0.0-alt1	43.0.0-alt1	ALT-PU-2026-5689-2	414049	Fixed
wasmtime	sisyphus_riscv64	43.0.0-alt1	43.0.0-alt1	ALT-PU-2026-7613-1	-	Fixed
wasmtime	sisyphus_loongarch64	43.0.0-alt1	43.0.0-alt1	ALT-PU-2026-7551-1	-	Fixed

References to Advisories, Solutions, and Tools

Hyperlink	Resource
https://github.com/bytecodealliance/wasmtime/commit/192f2fcdadfec9d0cf6b58548a85a7307450cbf5	Patch
https://github.com/bytecodealliance/wasmtime/pull/11592	Patch
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-4h67-722j-5pmc	Patch Third Party Advisory
GHSA-4h67-722j-5pmc

Affected configurations:
1. cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:rust:*:*
  Start including
  38.0.0
  End excluding
  38.0.3

Version: v26.5.1