{
  "cveId": "CVE-2026-98135",
  "url": "https://patchblox.com/security/cve/CVE-2026-98135",
  "summary": "CVE-2026-98135 is fixed in linux on 1 platform by DEBIAN-CVE-2026-98135 (version 7.2.7-1), released October 2, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  ntfs: reject invalid sectors_per_cluster in the...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ntfs: reject invalid sectors_per_cluster in the boot sector  is_boot_sector_ntfs() checks the boot sector\u0027s sectors_per_cluster field with a range test that rejects 0x81..0xf3 but accepts 0 and other non-power-of-two counts. A zero value reaches parse_ntfs_boot_sector():  \tsectors_per_cluster_bits = ffs(sectors_per_cluster) - 1; \t... \tvol-\u003Ecluster_size = vol-\u003Esector_size \u003C\u003C sectors_per_cluster_bits;  ffs(0) is 0, so sectors_per_cluster_bits becomes (unsigned)-1 and the shift is undefined:    UBSAN: shift-out-of-bounds in fs/ntfs/super.c:673:39   shift exponent 4294967295 is too large for 32-bit type \u0027int\u0027  This change rejects any non-power-of-two value, since it feeds the aforementioned shift via ffs() - 1, which only yields the correct shift for a power of two.",
  "published": "2026-09-25T11:17:44Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.001,
  "epssPercentile": 0.00873,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.7-1",
      "fix": "DEBIAN-CVE-2026-98135",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98135",
      "released": "2026-10-02T21:04:56Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}