CVE-2025-64713Public exploit

Runtime crash via mismatched fast-interpreter arrays

Published Nov 25, 2025 · Updated Nov 26, 2025

Out-of-bounds access in WAMR before 2.4.4 allows local users to crash the runtime by loading crafted Wasm bytecode. GET_GLOBAL(I32) can expand frame_ref_bottom without expanding frame_offset_bottom; a following if operation makes preserve_local_for_block traverse the shorter array using stack_cell_num. Fast-interpreter mode and nearly full frame arrays are required, and the published CNA assessment limits the consequence to loss of runtime availability.

CVSS severity5.1
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in WAMR before 2.4.4 allows local users to crash the runtime by loading crafted Wasm bytecode. GET_GLOBAL(I32) can expand frame_ref_bottom without expanding frame_offset_bottom; a following if operation makes preserve_local_for_block traverse the shorter array using stack_cell_num. Fast-interpreter mode and nearly full frame arrays are required, and the published CNA assessment limits the consequence to loss of runtime availability.

The record

CVE
CVE-2025-64713
Published
Nov 25, 2025
Updated
Nov 26, 2025
Vendor
Bytecode Alliance
Product
WebAssembly Micro Runtime (WAMR)
Classifications
CWE-119, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 26, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.4.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Bytecode Alliance · WebAssembly Micro Runtime (WAMR)version=< 2.4.4

Published CVSS scores

7.4NIST NVDCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
5.1GitHub, Inc.CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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