Bug 2423909 (CVE-2025-14956)

Summary: CVE-2025-14956 binaryen: heap-based buffer overflow in WasmBinaryReader::readExpression() when parsing a malformed WebAssembly binary
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Binaryen. A heap-based buffer over-read can be triggered in the WasmBinaryReader::readExpression function when parsing a malformed WebAssembly binary, resulting in a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2429125, 2429126, 2429127    
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Description OSIDB Bzimport 2025-12-19 17:01:24 UTC 
A vulnerability was determined in WebAssembly Binaryen up to 125. Affected by this issue is the function WasmBinaryReader::readExport of the file src/wasm/wasm-binary.cpp. This manipulation causes heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. Patch name: 4f52bff8c4075b5630422f902dd92a0af2c9f398. It is recommended to apply a patch to fix this issue.