Linux Kernel up to 6.12.27/6.14.5/6.15-rc4 iommu iommu_copy_struct_from_user null pointer dereference

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.12.27/6.14.5/6.15-rc4 and classified as critical. Affected by this vulnerability is the function iommu_copy_struct_from_user of the component iommu. The manipulation leads to null pointer dereference. This vulnerability is listed as CVE-2025-37900. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.12.27/6.14.5/6.15-rc4. This issue affects the function iommu_copy_struct_from_user of the component iommu. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: iommu: Fix two issues in iommu_copy_struct_from_user() In the review for iommu_copy_struct_to_user() helper, Matt pointed out that a NULL pointer should be rejected prior to dereferencing it: https://lore.kernel.org/all/[email protected] And Alok pointed out a typo at the same time: https://lore.kernel.org/all/[email protected] Since both issues were copied from iommu_copy_struct_from_user(), fix them first in the current header.

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2025-37900 since 04/16/2025. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 242283 (Ubuntu 24.04 LTS : Linux kernel (OEM) vulnerabilities (USN-7650-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.12.28, 6.14.6 or 6.15-rc5 eliminates this vulnerability. Applying the patch 2e303d010722787dc84d94f68d70fe10dfc1b9ea/967d6f0d9a20a1bf15ee7ed881e2d4e532e22709/30a3f2f3e4bd6335b727c83c08a982d969752bc1 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (242283) and CERT Bund (WID-SEC-2025-1114). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• Dell Avamar
• Open Source Linux Kernel
• Dell NetWorker
• Dell Secure Connect Gateway

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.12.0
• 6.12.1
• 6.12.2
• 6.12.3
• 6.12.4
• 6.12.5
• 6.12.6
• 6.12.7
• 6.12.8
• 6.12.9
• 6.12.10
• 6.12.11
• 6.12.12
• 6.12.13
• 6.12.14
• 6.12.15
• 6.12.16
• 6.12.17
• 6.12.18
• 6.12.19
• 6.12.20
• 6.12.21
• 6.12.22
• 6.12.23
• 6.12.24
• 6.12.25
• 6.12.26
• 6.12.27
• 6.14.0
• 6.14.1
• 6.14.2
• 6.14.3
• 6.14.4
• 6.14.5
• 6.15-rc1
• 6.15-rc2
• 6.15-rc3
• 6.15-rc4

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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