The Arm Mali GPU kernel driver allows unprivileged users to access freed memory because GPU memory operations are mishandled. This affects Bifrost r0p0 through r38p1, and r39p0; Valhall r19p0 through r38p1, and r39p0; and Midgard r4p0 through r32p0.
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 Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Bifrost_gpu_kernel_driver | Arm | r0p0 (including) | r38p1 (including) |
| Bifrost_gpu_kernel_driver | Arm | r39p0 (including) | r39p0 (including) |
| Midgard_gpu_kernel_driver | Arm | r4p0 (including) | r31p0 (including) |
| Valhall_gpu_kernel_driver | Arm | r19p0 (including) | r38p1 (including) |
| Valhall_gpu_kernel_driver | Arm | r39p0 (including) | r39p0 (including) |