. The Arm Mali GPU kernel driver allows an unprivileged user to achieve access to freed memory, leading to information disclosure or root privilege escalation. This affects Bifrost r16p0 through r29p0 before r30p0, Valhall r19p0 through r29p0 before r30p0, and Midgard r28p0 through r30p0.
Weakness
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 Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Bifrost_gpu_kernel_driver | Arm | r16p0 (including) | r30p0 (excluding) |
| Midgard_gpu_kernel_driver | Arm | r28p0 (including) | r31p0 (excluding) |
| Valhall_gpu_kernel_driver | Arm | r19p0 (including) | r30p0 (excluding) |