Use After Free vulnerability in Arm Ltd Valhall GPU Kernel Driver, Arm Ltd Arm 5th Gen GPU Architecture Kernel Driver allows a local non-privileged user process to make improper GPU processing operations to gain access to already freed memory.This issue affects Valhall GPU Kernel Driver: from r48p0 through r49p1, from r50p0 through r52p0; Arm 5th Gen GPU Architecture Kernel Driver: from r48p0 through r49p1, from r50p0 through r52p0.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.