A heap-based buffer overflow vulnerability in Huawei HarmonyOS versions 6.0.0 and 5.1.0 poses a significant risk to system stability and availability.

This vulnerability is a heap-based buffer overflow (CWE-122) located within the image module of the operating system. Based on the CVSS vector, the attack vector is local, meaning an attacker requires access to the device to trigger the flaw without authentication.

The exploitation of this vulnerability primarily impacts system availability, which could result in unexpected device crashes or service disruptions. With a CVSS score of 7.3, this flaw is categorized as High, necessitating prompt attention to ensure the continued integrity and reliability of enterprise-managed mobile or embedded devices.

Immediate Action: Review the official Huawei security bulletins for February 2026 and apply the recommended system updates as soon as they become available for your specific device model.

Proactive Monitoring: Monitor system logs for unusual crashes or service restarts that may indicate attempted exploitation of the image module.

Compensating Controls: Limit access to physical devices and ensure that untrusted image files are not processed by the system until the patch is applied.

Public Exploit Available: Unknown

Given the severity of potential availability impacts, administrators should prioritize the deployment of security patches provided by Huawei. While there is no current evidence of active exploitation, the risk to operational continuity remains, and applying vendor-supplied updates is the only definitive method to remediate the underlying buffer overflow.