Description
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.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= be51b1d6bbff48c7d1943a8ff1e5a55777807f6e, < c4c71368bc5c5b3840590d39b4cfa12d733cadf4; >= be51b1d6bbff48c7d1943a8ff1e5a55777807f6e, < bcffb1c75da8fc9d51168ff9f09d471c26507912; >= be51b1d6bbff48c7d1943a8ff1e5a55777807f6e, < 968e9a1f71140c86dc4092f6b361e997923f3813; >= be51b1d6bbff48c7d1943a8ff1e5a55777807f6e, < 37a96a30617a4c96f048a5874c00509bc4fe4d85; >= be51b1d6bbff48c7d1943a8ff1e5a55777807f6e, < 530f8f9c3546cb3ebee1b135375aaee08a073ebb |
| Linux | Linux | 6.2 |
References
- https://git.kernel.org/stable/c/37a96a30617a4c96f048a5874c00509bc4fe4d85
- https://git.kernel.org/stable/c/530f8f9c3546cb3ebee1b135375aaee08a073ebb
- https://git.kernel.org/stable/c/968e9a1f71140c86dc4092f6b361e997923f3813
- https://git.kernel.org/stable/c/bcffb1c75da8fc9d51168ff9f09d471c26507912
- https://git.kernel.org/stable/c/c4c71368bc5c5b3840590d39b4cfa12d733cadf4
Timeline
- Published
- Sep 11, 2026
- Last modified
- Oct 21, 2026
- NVD status
- Received