krnel Module Fixes Possible UAF in amdgpu Code

CVE-2023-52921

What is CVE-2023-52921?

The vulnerability in the Linux kernel pertains to a use-after-free issue within the AMD graphics driver, specifically in the amdgpu_cs_pass1 function. The gang_size check is incorrectly placed outside of the chunk parsing loop, which may lead to improper handling of the chunk data when freed. This flaw was brought to attention by security researcher Ye Zhang from Baidu Security and has been addressed in subsequent kernel updates. Users relying on AMD GPUs are urged to ensure their systems are updated to mitigate potential risks associated with this vulnerability.

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