What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-01 · updated 2026-06-17
• Weakness: CWE-476

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.

Affected products

• Debian Linux: 11.0
• Linux kernel: from 5.19 before 6.1.135; from 6.2 before 6.6.88; from 6.7 before 6.12.24; from 6.13 before 6.13.12; from 6.14 before 6.14.3; 6.15-rc1 — fixed in 6.1.135, 6.12.24, 6.13.12, 6.14.3, 6.6.88

How to fix

Upgrade to a fixed version: Linux kernel 6.1.135, 6.12.24, 6.13.12, 6.14.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2f75cb27bef43c8692b0f5e471e5632f6a9beb99
• https://git.kernel.org/stable/c/38e8844005e6068f336a3ad45451a562a0040ca1
• https://git.kernel.org/stable/c/69f9d2d37d1207c5a73dac52a4ce1361ead707f5
• https://git.kernel.org/stable/c/6abd09bed43b8d83d461e0fb5b9a200a06aa8a27
• https://git.kernel.org/stable/c/a0842539e8ef9386c070156103aff888e558a60c
• https://git.kernel.org/stable/c/ce7d3b2f6f393fa35f0ea12861b83a1ca28b295c
• https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

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