iommu/mediatek: Fix NULL pointer deference in mtk_iommu_device_group
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-476.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.19 and later | 6.1.135, 6.6.88, 6.12.24, 6.13.12, 6.14.3, 6.15 | Patch available | CNA |
- Linux VendorLinux Affected 5.19 and later Fixed in 6.1.135, 6.6.88, 6.12.24, 6.13.12, 6.14.3, 6.15 Patch available CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.19 to before 6.1.135; 6.2 to before 6.6.88; 6.7 to before 6.12.24; 6.13 to before 6.13.12; 6.14 to before 6.14.3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:* | 6.15 rc1 | Vulnerable | Linux |
| cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* | 11.0 | Vulnerable | Debian |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.19 to before 6.1.135; 6.2 to before 6.6.88; 6.7 to before 6.12.24; 6.13 to before 6.13.12; 6.14 to before 6.14.3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:* Versions 6.15 rc1 Vulnerable ·Linux
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.1.135, 6.6.88, 6.12.24, 6.13.12, 6.14.3, 6.15
Vendor assessments
Red Hat
Not affected: 5 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2025-37748
- 2026-10-03 Alias added: GHSA-36j9-2v33-g5mg
References
Patch 6
- https://git.kernel.org/stable/c/2f75cb27bef43c8692b0f5e471e5632f6a9beb99
- https://git.kernel.org/stable/c/6abd09bed43b8d83d461e0fb5b9a200a06aa8a27
- https://git.kernel.org/stable/c/a0842539e8ef9386c070156103aff888e558a60c
- https://git.kernel.org/stable/c/ce7d3b2f6f393fa35f0ea12861b83a1ca28b295c
- https://git.kernel.org/stable/c/69f9d2d37d1207c5a73dac52a4ce1361ead707f5
- https://git.kernel.org/stable/c/38e8844005e6068f336a3ad45451a562a0040ca1
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Sources
- CVE-2025-37748 · CVE Program
- CVE-2025-37748 · NVD
- FIRST EPSS
- GHSA-36j9-2v33-g5mg · GitHub Advisory Database · CC BY 4.0
- CVE-2025-37748 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences