Linux Kernel Vulnerability in IOMMU Test Infrastructure

CVE-2025-71122

What is CVE-2025-71122?

A vulnerability has been identified in the Linux kernel's IOMMU test infrastructure, particularly impacting test kernels with CONFIG_IOMMUFD_TEST enabled. Discovered by syzkaller, this issue can lead to an overflow in mathematical calculations within the test framework. As a result, it may cause a WARN_ON error by corrupting the reserved interval tree, potentially jeopardizing the integrity of the testing process. The vulnerability underscores the importance of validating user input length in test ioctl operations to prevent exploits arising from unexpected or malicious input.

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