iommu/amd/pgtbl: Fix possible race while increase page table level

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SUSE CVE-2025-39961

In the Linux kernel, the following vulnerability has been resolved: iommu/amd/pgtbl: Fix possible race while increase page table level The AMD IOMMU host page table implementation supports dynamic page table levels up to 6 levels, starting with a 3-level configuration that expands based on IOVA...

AZL-68348 CVE-2025-39961 affecting package kernel for versions less than 6.6.112.1-1

In the Linux kernel, the following vulnerability has been resolved: iommu/amd/pgtbl: Fix possible race while increase page table level The AMD IOMMU host page table implementation supports dynamic page table levels up to 6 levels, starting with a 3-level configuration that expands based on IOVA...

UBUNTU-CVE-2025-39961

In the Linux kernel, the following vulnerability has been resolved: iommu/amd/pgtbl: Fix possible race while increase page table level The AMD IOMMU host page table implementation supports dynamic page table levels up to 6 levels, starting with a 3-level configuration that expands based on IOVA...

CVE-2025-39961

Summary. CVE-2025-39961 covers a race in the AMD IOMMU pgtable path where unmap may read pgtable->[root/mode] without a lock while the driver increases address space. This can lead to reading a mismatched page-table level, causing iommu_unmap to fail and upper layers to log WARN_ON. The fix, i...