CVE-2023-53248 drm/amdgpu: install stub fence into potential unused fence pointers
A null pointer dereference in the Linux kernel's amdgpu driver can cause a denial of service when CPU updates page tables.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-53248?
CVE-2023-53248 is a medium-severity vulnerability in Linux kernel, published on 15 Sep 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-476
Which versions are affected by CVE-2023-53248?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2023-53248?
Apply the vendor's patch.
Is CVE-2023-53248 being exploited?
There is no known exploitation of CVE-2023-53248 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-71239, BELL-CVE-2023-53248, DEBIAN-CVE-2023-53248, GHSA-96mj-4fv4-g633, ROOT-OS-DEBIAN-11-CVE-2023-53248, ROOT-OS-UBUNTU-2204-CVE-2023-53248 and 1 more.