Bug 2327173 (CVE-2023-52921)

Summary: CVE-2023-52921 kernel: drm/amdgpu: fix possible UAF in amdgpu_cs_pass1()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2024-11-19 02:01:43 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: fix possible UAF in amdgpu_cs_pass1()

Since the gang_size check is outside of chunk parsing
loop, we need to reset i before we free the chunk data.

Suggested by Ye Zhang (@VAR10CK) of Baidu Security.
Comment 1 Avinash Hanwate 2024-11-19 05:53:22 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024111958-CVE-2023-52921-78df@gregkh/T