CVE-2025-37748 iommu/mediatek: Fix NULL pointer deference in mtk_iommu_device_group

What is CVE-2025-37748?

CVE-2025-37748 is a medium-severity vulnerability in Debian Debian Linux, published on 1 May 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/mediatek: Fix NULL pointer deference in mtk_iommu_device_group

Currently, mtk_iommu calls during probe iommu_device_register before the hw_list from driver data is initialized. Since iommu probing issue fix, it leads to NULL pointer dereference in mtk_iommu_device_group when hw_list is accessed with list_first_entry (not null safe).

So, change the call order to ensure iommu_device_register is called after the driver data are initialized.

Weakness: CWE-476

Which versions are affected by CVE-2025-37748?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2025-37748?

Apply the vendor's patch.

Is CVE-2025-37748 being exploited?

There is no known exploitation of CVE-2025-37748 in the wild and no public exploit code.

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All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2025-37748, DEBIAN-CVE-2025-37748, GHSA-36j9-2v33-g5mg, ROOT-OS-DEBIAN-12-CVE-2025-37748, ROOT-OS-UBUNTU-2404-CVE-2025-37748, UBUNTU-CVE-2025-37748.