CVE-2025-6273 MEDIUM

CVE-2025-6273: WebAssembly wabt binary-reader-objdump.cc LogOpcode assertion

Vendor Webassembly
Product wabt
Weakness CWE-617
Published June 19, 2025
Last update June 23, 2025

CVSS base score

4.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

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

What the vulnerability does

01Description

A vulnerability was found in WebAssembly wabt up to 1.0.37 and classified as problematic. This issue affects the function LogOpcode of the file src/binary-reader-objdump.cc. The manipulation leads to reachable assertion. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The code maintainer explains that this issue might not affect "real world wasm programs".

Key dates

02Disclosure timeline

June 19, 2025 CVE published
June 23, 2025 Record updated