CVE-2025-14957CWE-404CWE-476

WebAssembly Binaryen IRBuilder wasm-ir-builder.cpp makeLocalTee null pointer dereference

Medium · published December 19, 2025

CVSS v4.0
4.8
EPSS
0%
Percentile
11.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
4.8 · MEDIUM
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
EPSS
0.00213 · 11.0th percentile
Weaknesses
CWE-404 · Improper Resource Shutdown or Release; CWE-476 · NULL Pointer Dereference
Published
2025-12-19T17:02Z
EPSS history
Timeline
  • 19 DEC 17:02Z
    WebAssembly Binaryen IRBuilder wasm-ir-builder.cpp makeLocalTee null pointer dereference
    cvelistv5