CVE-2026-98309 drm/vc4: Use managed KMS polling to fix UAF on unbind

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/gpu/drm/vc4/vc4_kms.c"
    ],
    "versions": [
      {
        "version": "c8b75bca92cbf064b9fa125fc74a85994452e935",
        "lessThan": "b6beee927e7f4e3142032ff91b2d0417cdddc0f6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c8b75bca92cbf064b9fa125fc74a85994452e935",
        "lessThan": "cf0c4432bda37b02e7d430ff5017228ceb7caf0c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c8b75bca92cbf064b9fa125fc74a85994452e935",
        "lessThan": "ee507691c18f9fee5d4751e295ab9a7ff31d59ae",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c8b75bca92cbf064b9fa125fc74a85994452e935",
        "lessThan": "7f9780df677370a19b4ec9764f13b1b82073e0d9",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c8b75bca92cbf064b9fa125fc74a85994452e935",
        "lessThan": "073a30d75f309812ed61af134f24ffef4107b13a",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/gpu/drm/vc4/vc4_kms.c"
    ],
    "versions": [
      {
        "version": "4.4",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.4",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.158",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.112",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.54",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.8",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3-rc4",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]