CVE-2026-89451

In the Linux kernel, the following vulnerability has been resolved:

iommu/sva: Set handle->dev before the SVA handle is visible

iommu attach device pasid() installs the new SVA attach handle in the group PASID lookup before iommu sva bind device() returns. A concurrent bind can therefore find and reuse the same handle after iommu sva lock is dropped.

handle->dev was initialized after dropping iommu sva lock. This leaves a window where a racing bind can return a handle whose dev pointer is still NULL. A subsequent iommu sva unbind device() can then dereference it via handle->dev->iommu group.

Initialize handle->dev before releasing iommu sva lock so any visible SVA handle is fully initialized.