CVE-2025-71122 iommufd/selftest: Check for overflow in IOMMU_TEST_OP_ADD_RESERVED

What is CVE-2025-71122?

CVE-2025-71122 is a high-severity vulnerability in Linux kernel, published on 14 Jan 2026. 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:

iommufd/selftest: Check for overflow in IOMMU_TEST_OP_ADD_RESERVED

syzkaller found it could overflow math in the test infrastructure and cause a WARN_ON by corrupting the reserved interval tree. This only effects test kernels with CONFIG_IOMMUFD_TEST.

Validate the user input length in the test ioctl.

Which versions are affected by CVE-2025-71122?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2025-71122?

Apply the vendor's patch.

Is CVE-2025-71122 being exploited?

There is no known exploitation of CVE-2025-71122 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-2025-71122, DEBIAN-CVE-2025-71122, GHSA-rgpf-6q47-j6p9, ROOT-OS-UBUNTU-2404-CVE-2025-71122, UBUNTU-CVE-2025-71122.