High severity · published Nov 25, 2025
CVE-2025-64713
WebAssembly Micro Runtime (WAMR) is a lightweight standalone WebAssembly (Wasm) runtime
7.4
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WM
Webassembly Micro Runtime · Bytecodealliance
before 2.4.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-64713
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-64713
Release Notes
https://github.com/bytecodealliance/wasm-micro-runtime/releases/tag/WAMR-2.4.4
Exploit
https://github.com/bytecodealliance/wasm-micro-runtime/security/advisories/GHSA-gvx3-gg3x-rjcx
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