Integer overflow in the graphics drivers in Huawei Mate S smartphones with software CRR-TL00 before CRR-TL00C01B160SP01, CRR-UL00 before CRR-UL00C00B160, and CRR-CL00 before CRR-CL00C92B161 allows attackers to cause a denial of service (system crash) or gain privileges via a crafted application, which triggers a heap-based buffer overflow.