{
  "cveId": "CVE-2026-89611",
  "url": "https://patchblox.com/security/cve/CVE-2026-89611",
  "summary": "CVE-2026-89611 is fixed in linux on 1 platform by DEBIAN-CVE-2026-89611 (version 7.2.6-1), released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "ntfs: validate non-resident attribute offsets",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ntfs: validate non-resident attribute offsets  ntfs_attr_update_meta() shifts the attribute name when converting between non-sparse and sparse attributes. Converting to sparse also adds the compressed_size field before the name and mapping pairs, requiring eight additional bytes in the attribute record.  However, the validator does not check that name_offset is within safe boundaries for these operations or that the additional space is available. A malicious MFT record could set name_offset such that:  1. The name is positioned at the very end of a non-sparse attribute.    Converting to sparse would shift the name forward by 8 bytes,    writing beyond the attribute boundary.  2. The name overlaps with the mapping pairs, causing corruption during    conversion.  Add validation to ensure: - For named attributes, name_offset is within valid bounds - Name does not extend beyond the attribute or overlap with mapping pairs - For non-sparse, non-compressed attributes, eight bytes are available   after mapping_pairs_offset for the compressed_size field  The space check also covers unnamed attributes, for which name_offset = 0 is valid and no name range needs to be checked.",
  "published": "2026-09-11T20:19:46Z",
  "severity": "Moderate",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00553,
  "epssPercentile": 0.46436,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-89611",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-89611",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89611",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}