{
  "cveId": "CVE-2026-64532",
  "url": "https://patchblox.com/security/cve/CVE-2026-64532",
  "summary": "CVE-2026-64532 is fixed in 57 products on 1 platform, first by DEBIAN-CVE-2026-64532, released August 1, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  fs/ntfs3: bound NTFS_DE view.data_off in UpdateR...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  fs/ntfs3: bound NTFS_DE view.data_off in UpdateRecordData{Root,Allocation}  In do_action()\u0027s UpdateRecordDataRoot (fslog.c:3489) and UpdateRecordDataAllocation (fslog.c:3697) cases, the memmove destination is \u0060Add2Ptr(e, le16_to_cpu(e-\u003Eview.data_off))\u0060, where e-\u003Eview.data_off comes from an on-disk NTFS_DE inside an INDEX_ROOT or INDEX_BUFFER.  Neither case validates view.data_off \u002B dlen against e-\u003Esize; the existing check_if_index_root / check_if_alloc_index helpers walk the entry chain and validate the entry\u0027s offset, but not its internal view fields.  The neighbouring read sites (e.g., fs/ntfs3/index.c when iterating view entries) check view.data_off \u002B view.data_size \u003C= e-\u003Esize.  Apply the same bound at the two memmove sites.  Reproduced under UML\u002BKASAN on mainline 8d90b09e6741 via pr_warn-only probe instrumentation: with view.data_off forced to 0xFFFC, the memmove writes 32 bytes past the end of the NTFS_DE.  This is similar in shape to Pavitra Jha\u0027s 2026-05-02 patch \u0022fs/ntfs3: prevent oob in case UpdateRecordDataRoot\u0022 (\u003C20260502105008.21827-1-jhapavitra98@gmail.com\u003E) which proposes calling ntfs3_bad_de_range(); that helper does not exist in mainline.  This patch uses inline checks.",
  "published": "2026-07-27T08:16:22Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "epss": 0.00133,
  "epssPercentile": 0.02863,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
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  "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"
  }
}