CVE-2023-53789 iommu/amd: Improve page fault error reporting

Not scored Published 9 Dec 2025 Updated 11 May 2026

A null pointer dereference in the AMD IOMMU page fault handler can cause a kernel crash, leading to denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2023-53789?

CVE-2023-53789 is a vulnerability in Linux, published on 9 Dec 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:

iommu/amd: Improve page fault error reporting

If IOMMU domain for device group is not setup properly then we may hit IOMMU page fault. Current page fault handler assumes that domain is always setup and it will hit NULL pointer derefence (see below sample log).

Lets check whether domain is setup or not and log appropriate message.

Sample log: ---------- amdgpu 0000:00:01.0: amdgpu: SE 1, SH per SE 1, CU per SH 8, active_cu_number 6 BUG: kernel NULL pointer dereference, address: 0000000000000058 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 2 PID: 56 Comm: irq/24-AMD-Vi Not tainted 6.2.0-rc2+ #89 Hardware name: xxx RIP: 0010:report_iommu_fault+0x11/0x90 [...] Call Trace: <TASK> amd_iommu_int_thread+0x60c/0x760 ? __pfx_irq_thread_fn+0x10/0x10 irq_thread_fn+0x1f/0x60 irq_thread+0xea/0x1a0 ? preempt_count_add+0x6a/0xa0 ? __pfx_irq_thread_dtor+0x10/0x10 ? __pfx_irq_thread+0x10/0x10 kthread+0xe9/0x110 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x2c/0x50 </TASK>

[joro: Edit commit message]

Which versions are affected by CVE-2023-53789?

How do I fix CVE-2023-53789?

Apply the vendor's patch.

Is CVE-2023-53789 being exploited?

There is no known exploitation of CVE-2023-53789 in the wild and no public exploit code.

Sources

Also known as BELL-CVE-2023-53789, DEBIAN-CVE-2023-53789, GHSA-p3hr-pr7r-f6m2, ROOT-OS-UBUNTU-2204-CVE-2023-53789, UBUNTU-CVE-2023-53789.