Huawei HarmonyOS is an operating system from Huawei, a Chinese company. It provides a full-scenario distributed operating system based on a microkernel.Huawei EMUI is a user interface developed by Huawei based on the Android operating system. Huawei HarmonyOS and EMUI are vulnerable to an out-of-bounds write vulnerability that can be exploited by an attacker to cause a denial of service.