{
  "cveId": "CVE-2026-72196",
  "url": "https://patchblox.com/security/cve/CVE-2026-72196",
  "summary": "CVE-2026-72196 is fixed in 56 products on 1 platform, first by DEBIAN-CVE-2026-72196, released August 15, 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 copy_lcns dp-\u003Epage_lcns[] index...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  fs/ntfs3: bound copy_lcns dp-\u003Epage_lcns[] index in analysis pass  In log_replay()\u0027s analysis pass, after find_dp() returns a valid DIR_PAGE_ENTRY for the (target_attr, target_vcn) tuple, the copy_lcns block walks lrh-\u003Elcns_follow further entries:  \tt16 = le16_to_cpu(lrh-\u003Elcns_follow); \tfor (i = 0; i \u003C t16; i\u002B\u002B) { \t    size_t j = (size_t)(le64_to_cpu(lrh-\u003Etarget_vcn) - \t                        le64_to_cpu(dp-\u003Evcn)); \t    dp-\u003Epage_lcns[j \u002B i] = lrh-\u003Epage_lcns[i]; \t}  find_dp() only validates that target_vcn falls within [dp-\u003Evcn, dp-\u003Evcn \u002B dp-\u003Elcns_follow), i.e., that the FIRST cluster is covered.  The walk through the further entries is not bounded against dp-\u003Elcns_follow.  For a malformed LRH where target_vcn = dp-\u003Evcn \u002B dp-\u003Elcns_follow - 1 and lrh-\u003Elcns_follow \u003E 1, the i \u003E 0 writes overflow the dp\u0027s allocated page_lcns[] array.  Add the missing j \u002B lrh-\u003Elcns_follow \u003C= dp-\u003Elcns_follow guard.  Reproduced under UML\u002BKASAN on mainline 8d90b09e6741 as a slab-out-of-bounds write of size 8 from log_replay\u002B0x68d4 on the mount path.  This is distinct from Pavitra Jha\u0027s 2026-05-02 patch (\u0022fs/ntfs3: validate lcns_follow in log_replay conversion\u0022, \u003C20260502154252.164586-1-jhapavitra98@gmail.com\u003E) which addresses the separate version-0 dirty-page-table conversion path\u0027s memmove(\u0026dp-\u003Evcn, ...) call.  The two fixes are complementary; both should land.  [almaz.alexandrovich@paragon-software.com: clang-formatted the changes, fixed conflicts]",
  "published": "2026-08-15T06:21:38Z",
  "severity": "high",
  "cvss": 8.4,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00185,
  "epssPercentile": 0.08143,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
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  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}