Riskcovery

CVE-2026-89451

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

State
Published
Severity
Not scored
Published
Sep 11, 2026
Updated
Oct 21, 2026
Reserved
Sep 11, 2026

Read the record on cve.org

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • be51b1d6bbff48c7d1943a8ff1e5a55777807f6e to before c4c71368bc5c5b3840590d39b4cfa12d733cadf4Affected
  • be51b1d6bbff48c7d1943a8ff1e5a55777807f6e to before bcffb1c75da8fc9d51168ff9f09d471c26507912Affected
  • be51b1d6bbff48c7d1943a8ff1e5a55777807f6e to before 968e9a1f71140c86dc4092f6b361e997923f3813Affected
  • be51b1d6bbff48c7d1943a8ff1e5a55777807f6e to before 37a96a30617a4c96f048a5874c00509bc4fe4d85Affected
  • be51b1d6bbff48c7d1943a8ff1e5a55777807f6e to before 530f8f9c3546cb3ebee1b135375aaee08a073ebbAffected
LinuxLinux
  • 6.2Affected
  • before 6.2Not affected
  • 6.6.160 through 6.6.*Not affected
  • 6.12.109 through 6.12.*Not affected
  • 6.18.50 through 6.18.*Not affected
  • 7.2.4 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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