# CVE-2025-64713: WebAssembly Micro Runtime (WAMR) is a lightweight standalone WebAssembly (Wasm) runtime. Prior to version 2.4.4, an…

Source: https://junglewise.ai/threats/cve-2025-64713-webassembly-micro-runtime-wamr-is-a-lightweight-standalone  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-11-25  
License: CC BY 4.0 with a link back

CVE-2025-64713 · Severity: medium · CVSS 5.1 · Published 2025-11-25

WebAssembly Micro Runtime (WAMR) is a lightweight standalone WebAssembly (Wasm) runtime. Prior to version 2.4.4, an out-of-bounds array access issue exists in WAMR's fast interpreter mode during WASM bytecode loading. When frame_ref_bottom and frame_offset_bottom arrays are at capacity and a GET_GLOBAL(I32) opcode is encountered, frame_ref_bottom is expanded but frame_offset_bottom may not be. If this is immediately followed by an if opcode that triggers preserve_local_for_block, the function traverses arrays using stack_cell_num as the upper bound, causing out-of-bounds access to frame_offset_bottom since it wasn't expanded to match the increased stack_cell_num. This issue has been patched in version 2.4.4.

Vendors: [Bytecodealliance](https://junglewise.ai/threats/vendors/bytecodealliance).

## Quick answers

**Is CVE-2025-64713 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-64713 being exploited in the wild.

**How severe is CVE-2025-64713?** Medium severity, with a CVSS score of 5.1, published 25 November 2025.

**Which products and versions are affected?** Bytecodealliance Webassembly Micro Runtime. The advisory does not name versions.

**Is there a fix for CVE-2025-64713?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-64713?** Check whether you run Bytecodealliance Webassembly Micro Runtime. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Bytecodealliance Webassembly Micro Runtime

## Related threats

- [WebAssembly Micro Runtime (WAMR) is a lightweight standalone WebAssembly (Wasm) runtime. Prior to version 2.4.4, WAMR…](https://junglewise.ai/threats/cve-2025-64704-webassembly-micro-runtime-wamr-is-a-lightweight-standalone)