Vulnerability-Lookup

GHSA-MM8R-PP22-XWXG

Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-09-11 21:31

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-89451"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-11T20:19:25Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/sva: Set handle-\u003edev 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-\u003edev 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-\u003edev-\u003eiommu_group.\n\nInitialize handle-\u003edev before releasing iommu_sva_lock so any visible SVA\nhandle is fully initialized.",
  "id": "GHSA-mm8r-pp22-xwxg",
  "modified": "2026-09-11T21:31:26Z",
  "published": "2026-09-11T21:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89451"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/37a96a30617a4c96f048a5874c00509bc4fe4d85"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/530f8f9c3546cb3ebee1b135375aaee08a073ebb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/968e9a1f71140c86dc4092f6b361e997923f3813"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bcffb1c75da8fc9d51168ff9f09d471c26507912"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-89451 (GCVE-0-2026-89451)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-09-11 19:43

Title

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

Summary

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.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/bcffb1c75da8fc9d5…
https://git.kernel.org/stable/c/968e9a1f71140c86d…
https://git.kernel.org/stable/c/37a96a30617a4c96f…
https://git.kernel.org/stable/c/530f8f9c3546cb3eb…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: be51b1d6bbff48c7d1943a8ff1e5a55777807f6e , < bcffb1c75da8fc9d51168ff9f09d471c26507912 (git) Affected: be51b1d6bbff48c7d1943a8ff1e5a55777807f6e , < 968e9a1f71140c86dc4092f6b361e997923f3813 (git) Affected: be51b1d6bbff48c7d1943a8ff1e5a55777807f6e , < 37a96a30617a4c96f048a5874c00509bc4fe4d85 (git) Affected: be51b1d6bbff48c7d1943a8ff1e5a55777807f6e , < 530f8f9c3546cb3ebee1b135375aaee08a073ebb (git)
Linux	Linux	Affected: 6.2 Unaffected: 0 , < 6.2 (semver) Unaffected: 6.12.109 , ≤ 6.12.* (semver) Unaffected: 6.18.50 , ≤ 6.18.* (semver) Unaffected: 7.2.4 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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    "dateReserved": "2026-09-11T19:38:34.706Z",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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