CVE-2023-53248 Details
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.
A vulnerability in the Linux kernel's AMDGPU driver can lead to a null pointer dereference. This issue arises when the CPU updates page tables, leaving virtual machine update fences unused. The vulnerability is present in the Linux kernel stable tree. The root cause is the failure to properly initialize fence pointers, which can result in a null dereference when the 'dma_fence_wait()' function is called. The vulnerability can be exploited by manipulating the virtual machine's page table update process, creating a scenario where the null pointer is dereferenced, potentially leading to a crash or undefined behavior.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been addressed. Instructions for downloading the patched version are available on the Linux kernel official website.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jan 14, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/187916e6ed9d0c3b3abc27429f7a5f8c936bd1f0 | kernel.org | Patch |
| https://git.kernel.org/stable/c/78b25110eb8c6990f7f5096bc0136c12a2b4cc99 | kernel.org | Patch |
| https://git.kernel.org/stable/c/aa9e9ba5748c524eb0925a2ef6984b78793646d6 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-476 | NULL Pointer Dereference | [email protected] |
| CWE-476 | NULL Pointer Dereference | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 4.2, < 6.1.47 >= 6.2, < 6.4.12 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jan 14, 2026 | CVE Modified | CISA-ADP |
| Dec 3, 2025 | Initial Analysis | [email protected] |
| Sep 15, 2025 | New CVE Received | kernel.org |