CVE-2025-14956 | THREATINT

Description

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.

PUBLISHED Reserved 2025-12-19 | Published 2025-12-19 | Updated 2025-12-19 | Assigner VulDB

MEDIUM: 4.8CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

MEDIUM: 5.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

MEDIUM: 5.3CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

4.3AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C

Problem types

Heap-based Buffer Overflow

Memory Corruption

Product status

125

affected

Timeline

2025-12-19:	Advisory disclosed
2025-12-19:	VulDB entry created
2025-12-19:	VulDB entry last update

Credits

Oneafter (VulDB User) reporter

References

vuldb.com/?id.337592 (VDB-337592 | WebAssembly Binaryen wasm-binary.cpp readExport heap-based overflow) vdb-entry technical-description

vuldb.com/?ctiid.337592 (VDB-337592 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.717315 (Submit #717315 | WebAssembly binaryen 9a226ac Heap-based Buffer Overflow) third-party-advisory

github.com/WebAssembly/binaryen/issues/8089 issue-tracking

github.com/WebAssembly/binaryen/pull/8092 issue-tracking

github.com/oneafter/1204/blob/main/hbf exploit

github.com/...ommit/4f52bff8c4075b5630422f902dd92a0af2c9f398 patch

cve.org (CVE-2025-14956)

nvd.nist.gov (CVE-2025-14956)

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