Imagination PowerVR GPU driver - cache subsystem information page: The driver's cache-subsystem information page

Impact

The driver's cache-subsystem information page, intended to be writable only by the driver, was mapped writable to userspace before DDK 1.18. A tenant process could alter driver cache state. Included as another instance of the GPU-driver-maps-too-much class that recurs across vendors.

Who can reach it

Unprivileged local application holding the GPU device node.

What to do

Update to Imagination DDK 1.18 or later. Not a datacenter part; treat as vendor-evaluation intelligence rather than a fleet action.

References