Executive brief
A security vulnerability exists in the communication module of Huawei HarmonyOS, which is used in smartphones, tablets, smartwatches, and Vision displays. If exploited, this flaw could allow an attacker to cause a system crash or make the device unresponsive, impacting the user's ability to use the device. This issue is addressed in the April 2026 security updates.
Technical details
A Use-After-Free (UAF) vulnerability exists in the communication module of Huawei HarmonyOS. The vulnerability is rooted in a race condition (CWE-362) during concurrent execution using shared resources with improper synchronization. An attacker with high privileges can exploit this locally under high-complexity conditions to trigger the UAF state. Successful exploitation results in a denial of service (DoS) affecting system availability. The issue affects HarmonyOS versions 5.1.0, 5.1.1, and 6.0.0 and has been patched in the April 2026 security bulletin.
Affected products
- Huawei HarmonyOS 5.1.0, 5.1.1, 6.0.0
Timeline
- 2026-04-08: patched: Huawei released security bulletins for phones, tablets, vision, and wearables.
- 2026-04-13: disclosed: CVE published to NVD.