CVE-2026-68303 (GCVE-0-2026-68303)
Vulnerability from cvelistv5
Published
2026-08-10 12:02
Modified
2026-10-21 12:43
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/vc4: hvs/v3d: Fix null dereference in unbind The hvs and v3d drivers use dev_get_drvdata(master) in their unbind functions. Since the vc4-drm gets removed before its dependent drivers (vc4_hvs/vc4_v3d) the vc4_hvs_unbind/vc4_v3d_unbind functions try to get drvdata of its master and fails with a null dereference error. Use the data pointer passed to the unbind functions directly instead of dev_get_drvdata(master). This avoids using potentially freed memory.
References
Impacted products
Vendor Product Version
Linux Linux Version: c8b75bca92cbf064b9fa125fc74a85994452e935
Version: c8b75bca92cbf064b9fa125fc74a85994452e935
Version: c8b75bca92cbf064b9fa125fc74a85994452e935
Version: c8b75bca92cbf064b9fa125fc74a85994452e935
Version: c8b75bca92cbf064b9fa125fc74a85994452e935
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{
  "containers": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/vc4/vc4_hvs.c",
            "drivers/gpu/drm/vc4/vc4_v3d.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "7.2",
              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vc4: hvs/v3d: Fix null dereference in unbind\n\nThe hvs and v3d drivers use dev_get_drvdata(master) in their unbind\nfunctions. Since the vc4-drm gets removed before its dependent drivers\n(vc4_hvs/vc4_v3d) the vc4_hvs_unbind/vc4_v3d_unbind functions try to\nget drvdata of its master and fails with a null dereference error.\n\nUse the data pointer passed to the unbind functions directly instead of\ndev_get_drvdata(master). This avoids using potentially freed memory."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:43:48.850Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/3be8dcc1a5854cf24cc332e0d6fc865c47ff49a1"
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          "url": "https://git.kernel.org/stable/c/8f62aae059e06746a18a00af27179c3c0f17f4c7"
        },
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          "url": "https://git.kernel.org/stable/c/708688ec31ac6b35103ba364dc300a09930079d4"
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        },
        {
          "url": "https://git.kernel.org/stable/c/7dc3680b7ffe01add3e9299fde8471d2dd53a8ae"
        }
      ],
      "title": "drm/vc4: hvs/v3d: Fix null dereference in unbind",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68303",
    "datePublished": "2026-08-10T12:02:37.512Z",
    "dateReserved": "2026-07-30T09:28:09.381Z",
    "dateUpdated": "2026-10-21T12:43:48.850Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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