🛡️ CVE-2025-14957 — binaryen

🟢 CVSS 3.3 — Low ⚠️ Exploit Public CWE-404 NVD

3.3

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability low.

Weakness class

CVE-2025-14957 is classified as CWE-404: Improper Resource Shutdown or Release. A resource is not released correctly after use, leaving it locked, leaked or in an inconsistent state.

Affected software

CVE-2025-14957 is recorded against 1 package.

binaryen (fixed in 125)

Timeline and source

Published on 19 December 2025 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. A vendor advisory or fix has been published. Record sourced from NVD.

References

github.com
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github.com
github.com
vuldb.com
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CVE-2025-14957 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Debian Ubuntu

Details

Severity LOW

CVSS Score 3.3

CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CWE CWE-404

Public Exploit ⚠️ Yes

Source NVD

Published 2025-12-19

Updated 2026-08-20

Modified 2026-06-17

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

Affected Packages

Software	From version	Fixed in
binaryen	—	125

References

https://github.com/WebAssembly/binaryen/

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

Exploit, Issue Tracking, Third Party Advisory https://github.com/WebAssembly/binaryen/issues/8090

Issue Tracking https://github.com/WebAssembly/binaryen/pull/8099

Not Applicable https://github.com/oneafter/1204/blob/main/af1

Permissions Required, VDB Entry https://vuldb.com/?ctiid.337593

Third Party Advisory, VDB Entry https://vuldb.com/?id.337593

Third Party Advisory, VDB Entry https://vuldb.com/?submit.717317

Third Party Advisory, VDB Entry https://vuldb.com/?submit.717319

🔗 NVD 🔗 Mitre ✅ Fix / Advisory

Similar Threats

Exploit Protection

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