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

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-09-11 19:43
VLAI
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
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: be51b1d6bbff48c7d1943a8ff1e5a55777807f6e , < bcffb1c75da8fc9d51168ff9f09d471c26507912 (git)
Affected: be51b1d6bbff48c7d1943a8ff1e5a55777807f6e , < 968e9a1f71140c86dc4092f6b361e997923f3813 (git)
Affected: be51b1d6bbff48c7d1943a8ff1e5a55777807f6e , < 37a96a30617a4c96f048a5874c00509bc4fe4d85 (git)
Affected: be51b1d6bbff48c7d1943a8ff1e5a55777807f6e , < 530f8f9c3546cb3ebee1b135375aaee08a073ebb (git)
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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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{
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          "product": "Linux",
          "programFiles": [
            "drivers/iommu/iommu-sva.c"
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              "negate": false,
              "operator": "OR"
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      ],
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          "value": "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."
        }
      ],
      "providerMetadata": {
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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    "assignerShortName": "Linux",
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    "datePublished": "2026-09-11T19:43:16.730Z",
    "dateReserved": "2026-09-11T19:38:34.706Z",
    "dateUpdated": "2026-09-11T19:43:16.730Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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      "percentile": "0.1"
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    "redhat_vex": {
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      "cve": "CVE-2026-89451",
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      "product_status:known_affected": "2",
      "source": "Red Hat CSAF VEX",
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      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89451.json",
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      "current_release_date": "2026-09-16T00:03:40Z",
      "cve": "CVE-2026-89451",
      "id": "CVE-2026-89451",
      "initial_release_date": "2026-09-16T00:03:40Z",
      "product_status:known_affected": "114",
      "product_status:known_not_affected": "239",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-89451",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-89451.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.