Bug 2395250 (CVE-2023-53248)

Summary: CVE-2023-53248 kernel: drm/amdgpu: install stub fence into potential unused fence pointers
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-09-15 15:03:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: install stub fence into potential unused fence pointers

When using cpu to update page tables, vm update fences are unused.
Install stub fence into these fence pointers instead of NULL
to avoid NULL dereference when calling dma_fence_wait() on them.
Comment 1 Keith Grant 2025-09-15 18:23:08 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091501-CVE-2023-53248-aa39@gregkh/T