TI-2025-13642 Aliases CVE-2025-14957 GHSA-3h23-rfwm-gcx3

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

LOW 21CWE-404Published 2025-12-19 · Updated 2026-02-24

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · Low
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-404.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00213 11th percentileScored 2026-11-07

Public exploit Yes 2 exploit referencesTagged by NVD and the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
WebAssembly	Binaryen	125	—	No fix listed	CNA

Binaryen VendorWebAssembly Affected 125 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:webassembly:binaryen::::::::	up to 125	Vulnerable	WebAssembly

cpe:2.3:a:webassembly:binaryen:*:*:*:*:*:*:*:* Versions up to 125 Vulnerable ·WebAssembly

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2025-14957
2026-10-03 Alias added: GHSA-3h23-rfwm-gcx3

References

Exploit 2

Patch 1

https://github.com/WebAssembly/binaryen/commit/6fb2b917a79578ab44cf3b900a6da4c27251e0d4

Other 2

TI-2020-13374 Heap-buffer-overflow in /src/wasm/wasm-binary.cpp in… CVSS 3.1MEDIUM 6.5
TI-2020-13373 A NULL pointer dereference was discovered in SExpressionWasmBuilder::makeBlock in… CVSS 3.1MEDIUM 6.5
TI-2026-07277 WebAssembly Binaryen BrOn wasm-ir-builder.cpp makeBrOn assertion CVSS 4.0MEDIUM 4.8
TI-2021-20472 A Denial of Service vulnerability exits in Binaryen 103 due to an assertion abort in wasm::handle_unreachable. CVSS 3.1HIGH 7.5
TI-2019-05428 In Binaryen 1.38.22, there is a use-after-free problem in… CVSS 3.1MEDIUM 6.5
TI-2019-05400 An assertion failure was discovered in wasm::WasmBinaryBuilder::getType() in… CVSS 3.1MEDIUM 6.5

See all 24 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences