CVE-2025-66326 Race condition in HarmonyOS

Medium 6.7 Published 8 Dec 2025 Updated 8 Dec 2025

A race condition in the HarmonyOS audio module allows attackers to cause a denial of service, affecting system availability.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-66326?

CVE-2025-66326 is a medium-severity vulnerability in Huawei Harmonyos, published on 8 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Race condition vulnerability in the audio module. Impact: Successful exploitation of this vulnerability may affect availability.

Weakness: CWE-362, CWE-416

Which versions are affected by CVE-2025-66326?

It affects 1 product.

Products include Huawei Harmonyos.

How do I fix CVE-2025-66326?

No fix has been published for CVE-2025-66326 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-66326 being exploited?

There is no known exploitation of CVE-2025-66326 in the wild and no public exploit code.

All Huawei Harmonyos vulnerabilities

Sources

Also known as GHSA-22x7-mc8g-7jg9.