A bug in the Linux kernel Intel IOMMU driver causes a warning to be emitted when an SVA (Support for Virtual Addressing) device is unbound on hardware that does not support PCI/PRI. The driver previously did not enable IOPF for such devices when binding, but the unbind path still attempted to disable IOPF, which had never been enabled. This mismatched operation triggers a warning in intel_iommu_disable_iopf() but does not alter device functionality or security state. The issue manifests only as a kernel log message and does not offer an attacker a means to execute code, gain elevated privileges, or breach confidentiality or integrity.

All Linux kernel builds that contain the Intel IOMMU driver before the fast fix commit (39c20c4e83b9) are affected. The vulnerability applies to any distribution or custom kernel that has not been updated to a version including this patch. No specific version numbers are provided in the data, so any kernel prior to the commit should be considered vulnerable.

The CVSS score is not available and the exploit probability score (EPSS) is not disclosed, indicating uncertainty about how frequently this will be triggered. The vulnerability is not listed in the CISA KEV catalog, and there is no known active exploitation. Because the bug only produces a warning without enabling any additional privileges, the overall risk is low. The most likely attack vector would involve a local user, but only to observe warnings in the system logs, which does not constitute a security incident.