CVE-2025-14957

low-risk

Published 2025-12-19

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.

Do I need to act?

0.02% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 3.3/10 Low

LOCAL / LOW complexity

Affected Products (1)

Binaryen

Affected Vendors

Webassembly

References (9)

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

Patch https://github.com/WebAssembly/binaryen/commit/6fb2b917a79578ab44cf3b900a6da4c27...

Exploit 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 https://vuldb.com/?ctiid.337593

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

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

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

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low-risk

Severity 13/34 · Low

Exploitability 0/34 · Minimal

Exposure 5/34 · Minimal