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CVE-2026-89451

Estado: RecibidaSin puntuar—

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

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "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"
}