Some Huawei Smartphones with software of VNS-L21AUTC555B141, VNS-L21C10B160, VNS-L21C66B160, VNS-L21C703B140 have an array out-of-bounds read vulnerability. Due to the lack verification of array, an attacker tricks a user into installing a malicious application, and the application can exploit the vulnerability and make attacker to read out of bounds of array and possibly cause the device abnormal.