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CVE-2025-6273

wabt: WebAssembly wabt reachable assertion

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Severity

Low

Red Hat Product Security

3.3

CVSS 3.1

Review impact separately from score.

Published · June 20, 2025

Updated · September 23, 2026

Description

A denial-of-service vulnerability has been identified in WebAssembly's WebAssembly Binary Toolkit (wabt), specifically within the LogOpcode function. This flaw allows an attacker with local access to trigger a program crash by manipulating input data, leading to a reachable assertion in the code path if the exception is improperly handled. Successful exploitation could impact the availability of applications or services that process WebAssembly binaries using wabt.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

CVSS / CWE

CVSS 3.1 · 3.3
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CWE-617 · Reachable Assertion