Linux Kernel Vulnerability in AMDGPU Driver

CVE-2023-53248

What is CVE-2023-53248?

A vulnerability within the Linux kernel, specifically in the AMDGPU driver, involves the improper handling of unused fence pointers. During CPU operations related to updating page tables, NULL pointers were previously installed, leading to potential NULL dereference errors when executing dma_fence_wait(). Recent patches address this by ensuring stub fences are installed instead of NULL pointers, enhancing the overall stability and security during page table updates.

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