Vulnerability in Linux Kernel Affecting Panfrost Graphics Driver

CVE-2022-50417

What is CVE-2022-50417?

A vulnerability in the Linux kernel related to the Panfrost graphics driver involves a use-after-free condition due to improper reference counting during the creation of GEM handles. The function panfrost_gem_create_with_handle() would return a buffer object (BO) with its only reference relying on the handle, which could be manipulated by user space. This flaw could lead to a scenario where user space releases the BO reference, resulting in a potential security risk. To mitigate this issue, the handle creation pattern was revised to ensure more robust reference management, enhancing overall security in user-space allocations.

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