CVE-2025-14957 MEDIUM

CVE-2025-14957: WebAssembly Binaryen IRBuilder wasm-ir-builder.cpp makeLocalTee null pointer dereference

Vendor Webassembly
Product Binaryen
Weakness CWE-476
Published December 19, 2025
Last update February 24, 2026
View on NVD All CVEs

CVSS base score

4.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

A vulnerability was identified in WebAssembly Binaryen up to 125. This affects the function IRBuilder::makeLocalGet/IRBuilder::makeLocalSet/IRBuilder::makeLocalTee of the file src/wasm/wasm-ir-builder.cpp of the component IRBuilder. Such manipulation of the argument Index leads to null pointer dereference. Local access is required to approach this attack. The exploit is publicly available and might be used. The name of the patch is 6fb2b917a79578ab44cf3b900a6da4c27251e0d4. Applying a patch is advised to resolve this issue.

Key dates

02Disclosure timeline

December 19, 2025 CVE published
February 24, 2026 Record updated