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.

CVSS

No CVSS.

References

Link	Resource
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

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-11 20:19

Updated : 2026-09-11 20:19

NVD link : CVE-2026-89451

Mitre link : CVE-2026-89451

CVE.ORG link : CVE-2026-89451

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-89451", "cveTags": [], "metrics": {}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "be51b1d6bbff48c7d1943a8ff1e5a55777807f6e", "lessThan": "bcffb1c75da8fc9d51168ff9f09d471c26507912", "versionType": "git"}, {"status": "affected", "version": "be51b1d6bbff48c7d1943a8ff1e5a55777807f6e", "lessThan": "968e9a1f71140c86dc4092f6b361e997923f3813", "versionType": "git"}, {"status": "affected", "version": "be51b1d6bbff48c7d1943a8ff1e5a55777807f6e", "lessThan": "37a96a30617a4c96f048a5874c00509bc4fe4d85", "versionType": "git"}, {"status": "affected", "version": "be51b1d6bbff48c7d1943a8ff1e5a55777807f6e", "lessThan": "530f8f9c3546cb3ebee1b135375aaee08a073ebb", "versionType": "git"}], "programFiles": ["drivers/iommu/iommu-sva.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.2"}, {"status": "unaffected", "version": "0", "lessThan": "6.2", "versionType": "semver"}, {"status": "unaffected", "version": "6.12.109", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.50", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.2.4", "versionType": "semver", "lessThanOrEqual": "7.2.*"}, {"status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/iommu/iommu-sva.c"], "defaultStatus": "affected"}]}], "published": "2026-09-11T20:19:25.727", "references": [{"url": "https://git.kernel.org/stable/c/37a96a30617a4c96f048a5874c00509bc4fe4d85", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/530f8f9c3546cb3ebee1b135375aaee08a073ebb", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/968e9a1f71140c86dc4092f6b361e997923f3813", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/bcffb1c75da8fc9d51168ff9f09d471c26507912", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/sva: Set handle->dev before the SVA handle is visible\n\niommu_attach_device_pasid() installs the new SVA attach handle in the\ngroup PASID lookup before iommu_sva_bind_device() returns. A concurrent\nbind can therefore find and reuse the same handle after iommu_sva_lock is\ndropped.\n\nhandle->dev was initialized after dropping iommu_sva_lock. This leaves a\nwindow where a racing bind can return a handle whose dev pointer is still\nNULL. A subsequent iommu_sva_unbind_device() can then dereference it via\nhandle->dev->iommu_group.\n\nInitialize handle->dev before releasing iommu_sva_lock so any visible SVA\nhandle is fully initialized."}], "lastModified": "2026-09-11T20:19:25.727", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}