CVE-2023-53248
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-15

Last updated on: 2025-12-03

Assigner: kernel.org

Description
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.
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Meta Information
Published
2025-09-15
Last Modified
2025-12-03
Generated
2026-06-16
AI Q&A
2025-09-15
EPSS Evaluated
2026-06-15
NVD
CVE-2023-53248
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 4.2 (inc) to 6.1.47 (exc)
linux linux_kernel From 6.2 (inc) to 6.4.12 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
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Executive Summary

This vulnerability in the Linux kernel's drm/amdgpu component involves the handling of fence pointers during CPU updates to page tables. When vm update fences are unused, the code previously set these fence pointers to NULL, which could lead to a NULL pointer dereference when dma_fence_wait() is called on them. The fix installs a stub fence into these potentially unused fence pointers instead of NULL to prevent this NULL dereference.

Impact Analysis

The vulnerability can cause a NULL pointer dereference in the Linux kernel when dma_fence_wait() is called on unused fence pointers set to NULL. This could potentially lead to kernel crashes or system instability when using the affected drm/amdgpu component during CPU page table updates.

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