Memory Management Vulnerability in Linux Kernel Affecting Framebuffer Operations

CVE-2023-53378

What is CVE-2023-53378?

A memory management vulnerability exists in the Linux kernel where the Direct Access Memory Transaction (DPT) Buffer Object (BO) is not treated as a framebuffer. This oversight can lead to the eviction of the DPT BO during hibernation, potentially causing system crashes or display faults under high memory pressure. The vulnerability particularly affects scenarios where the DPT is allocated from regular shared memory (shmem). As a result, the kernel may attempt to rewrite page table entries of an already evicted DPT object, leading to instability and operational failures.

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