Linux Kernel Vulnerability Related to PASID and Dirty Tracking

CVE-2026-53372

What is CVE-2026-53372?

A vulnerability exists in the Linux kernel's IOMMU component where the lack of dirty tracking support on a nested domain attached to a Process Address Space Identifier (PASID) can lead to risks of losing dirty pages during memory operations. Specifically, if the parent domain is configured with dirty tracking, the attachment to the nested domain is blocked. This anomaly may compromise data integrity, underscoring the importance of timely updates and patches for kernels utilizing PASID in their configurations.

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