Huawei HarmonyOS and EMUI Out-of-Bounds Write Vulnerability in the File System

A vulnerability allowing out-of-bounds write operations has been identified in the file system of Huawei's HarmonyOS and EMUI. This vulnerability affects several different versions and ranges of HarmonyOS, as well as EMUI 15.0.0 and earlier versions. Successful exploitation of this vulnerability may impact the operating system's availability.

Impact

Exploitation of this vulnerability may lead to a denial-of-service condition, causing disruptions in the normal operation of the device or application.

Remediation

Users can refer to the Huawei Security Bulletin for April 2026 for guidance on applying the latest security updates that address this vulnerability.