CVE-2025-37900 iommu: Fix two issues in iommu_copy_struct_from_user()

What is CVE-2025-37900?

CVE-2025-37900 is a medium-severity vulnerability in Linux kernel, published on 20 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: 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.

Weakness: CWE-476

Which versions are affected by CVE-2025-37900?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2025-37900?

Apply the vendor's patch.

Is CVE-2025-37900 being exploited?

There is no known exploitation of CVE-2025-37900 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

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

Also known as BELL-CVE-2025-37900, DEBIAN-CVE-2025-37900, GHSA-j23c-3429-q5qm, ROOT-OS-UBUNTU-2404-CVE-2025-37900, UBUNTU-CVE-2025-37900.