CVE-2026-68448 ovl: check access to copy_file_range source with src mounter creds

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/overlayfs/file.c"
    ],
    "versions": [
      {
        "version": "5dae222a5ff0c269730393018a5539cc970a4726",
        "lessThan": "9ec22c8113d8cf72ed7197bb61037dcad09e50d8",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5dae222a5ff0c269730393018a5539cc970a4726",
        "lessThan": "1f4a107439d2e43db176e34919933e617cb7f2c5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "5dae222a5ff0c269730393018a5539cc970a4726",
        "lessThan": "a1e0eb8f55cfe09bb31a202a388babc411292656",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/overlayfs/file.c"
    ],
    "versions": [
      {
        "version": "5.3",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.3",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.42",
        "lessThanOrEqual": "6.18.*",
        "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"
      }
    ]
  }
]