{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2025-71067",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-71067",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2026-01-13T15:31:22.585Z",
    "updatedAt": "2026-05-11T21:54:05.851Z",
    "importedAt": "2026-10-24T01:57:44.935Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "ntfs: set dummy blocksize to read boot_block when mounting",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: set dummy blocksize to read boot_block when mounting\n\nWhen mounting, sb->s_blocksize is used to read the boot_block without\nbeing defined or validated. Set a dummy blocksize before attempting to\nread the boot_block.\n\nThe issue can be triggered with the following syz reproducer:\n\n  mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='./file1\\x00', 0x0)\n  r4 = openat$nullb(0xffffffffffffff9c, &(0x7f0000000040), 0x121403, 0x0)\n  ioctl$FS_IOC_SETFLAGS(r4, 0x40081271, &(0x7f0000000980)=0x4000)\n  mount(&(0x7f0000000140)=@nullb, &(0x7f0000000040)='./cgroup\\x00',\n        &(0x7f0000000000)='ntfs3\\x00', 0x2208004, 0x0)\n  syz_clone(0x88200200, 0x0, 0x0, 0x0, 0x0, 0x0)\n\nHere, the ioctl sets the bdev block size to 16384. During mount,\nget_tree_bdev_flags() calls sb_set_blocksize(sb, block_size(bdev)),\nbut since block_size(bdev) > PAGE_SIZE, sb_set_blocksize() leaves\nsb->s_blocksize at zero.\n\nLater, ntfs_init_from_boot() attempts to read the boot_block while\nsb->s_blocksize is still zero, which triggers the bug.\n\n[almaz.alexandrovich@paragon-software.com: changed comment style, added\nreturn value handling]",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "28861e3bbd9e7ac4cd9c811aad71b4d116e27930",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0c9327c8abf9c8f046e45008bb43d94d8ee5c6c5"
            },
            {
              "version": "28861e3bbd9e7ac4cd9c811aad71b4d116e27930",
              "status": "affected",
              "versionType": "git",
              "lessThan": "44a38eb4f7876513db5a1bccde74de9bc4389d43"
            },
            {
              "version": "28861e3bbd9e7ac4cd9c811aad71b4d116e27930",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4fff9a625da958a33191c8553a03283786f9f417"
            },
            {
              "version": "28861e3bbd9e7ac4cd9c811aad71b4d116e27930",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b3c151fe8f543f1a0b8b5df16ce5d97afa5ec85a"
            },
            {
              "version": "28861e3bbd9e7ac4cd9c811aad71b4d116e27930",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d1693a7d5a38acf6424235a6070bcf5b186a360d"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.15",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.15"
            },
            {
              "version": "6.1.167",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.120",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.64",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}