CVE-2025-64704: WebAssembly Micro Runtime vulnerable to a segmentation fault in v128.store instruction

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-11-25 · updated 2026-10-18
Weakness: CWE-754

Description

WebAssembly Micro Runtime (WAMR) is a lightweight standalone WebAssembly (Wasm) runtime. Prior to version 2.4.4, WAMR is susceptible to a segmentation fault in v128.store instruction. This issue has been patched in version 2.4.4.

Affected products

bytecodealliance wasm-micro-runtime: before 2.4.4 — fixed in 2.4.4

How to fix

Upgrade to a fixed version: bytecodealliance wasm-micro-runtime 2.4.4. Check the vendor advisory for mitigations.

References

https://github.com/bytecodealliance/wasm-micro-runtime/releases/tag/WAMR-2.4.4
https://github.com/bytecodealliance/wasm-micro-runtime/security/advisories/GHSA-2f2p-wf5w-82qr
https://github.com/bytecodealliance/wasm-micro-runtime/security/advisories/GHSA-2f2p-wf5w-82qr

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