CVE-2026-68303 drm/vc4: hvs/v3d: Fix null dereference in 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_hvs.c",
      "drivers/gpu/drm/vc4/vc4_v3d.c"
    ],
    "versions": [
      {
        "version": "c8b75bca92cbf064b9fa125fc74a85994452e935",
        "lessThan": "261f0a3f0ac03248284f5116d3258f89c9642215",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "c8b75bca92cbf064b9fa125fc74a85994452e935",
        "lessThan": "7dc3680b7ffe01add3e9299fde8471d2dd53a8ae",
        "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_hvs.c",
      "drivers/gpu/drm/vc4/vc4_v3d.c"
    ],
    "versions": [
      {
        "version": "4.4",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.4",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.6",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2-rc5",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]