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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-89451
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:19:25 UTC
Updated2026-09-11 20:19:25 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.002000000 probability, percentile 0.099580000 (date 2026-09-12)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected be51b1d6bbff48c7d1943a8ff1e5a55777807f6e bcffb1c75da8fc9d51168ff9f09d471c26507912 git Not specified
CNA Linux Linux affected be51b1d6bbff48c7d1943a8ff1e5a55777807f6e 968e9a1f71140c86dc4092f6b361e997923f3813 git Not specified
CNA Linux Linux affected be51b1d6bbff48c7d1943a8ff1e5a55777807f6e 37a96a30617a4c96f048a5874c00509bc4fe4d85 git Not specified
CNA Linux Linux affected be51b1d6bbff48c7d1943a8ff1e5a55777807f6e 530f8f9c3546cb3ebee1b135375aaee08a073ebb git Not specified
CNA Linux Linux affected 6.2 Not specified
CNA Linux Linux unaffected 6.2 semver Not specified
CNA Linux Linux unaffected 6.12.109 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.50 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/bcffb1c75da8fc9d51168ff9f09d471c26507912 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/968e9a1f71140c86dc4092f6b361e997923f3813 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/37a96a30617a4c96f048a5874c00509bc4fe4d85 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/530f8f9c3546cb3ebee1b135375aaee08a073ebb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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