What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-12-19 · updated 2026-06-17
• Weakness: CWE-404

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.

Affected products

• WebAssembly Binaryen: through 125

References

• https://github.com/WebAssembly/binaryen/
• https://github.com/WebAssembly/binaryen/commit/6fb2b917a79578ab44cf3b900a6da4c27251e0d4
• https://github.com/WebAssembly/binaryen/issues/8090
• https://github.com/WebAssembly/binaryen/pull/8099
• https://github.com/oneafter/1204/blob/main/af1
• https://vuldb.com/?ctiid.337593
• https://vuldb.com/?id.337593
• https://vuldb.com/?submit.717317
• https://vuldb.com/?submit.717319

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