{
  "cveId": "CVE-2026-64533",
  "url": "https://patchblox.com/security/cve/CVE-2026-64533",
  "summary": "CVE-2026-64533 is fixed in 57 products on 1 platform, first by DEBIAN-CVE-2026-64533, 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: validate lcns_follow in log_replay con...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  fs/ntfs3: validate lcns_follow in log_replay conversion  log_replay() converts DIR_PAGE_ENTRY_32 records into DIR_PAGE_ENTRY records when replaying version 0 restart tables.  During this conversion, the memmove() length is derived directly from the on-disk lcns_follow field:  \tmemmove(\u0026dp-\u003Evcn, \u0026dp0-\u003Evcn_low, \t\t2 * sizeof(u64) \u002B \t\t\t\tle32_to_cpu(dp-\u003Elcns_follow) * sizeof(u64));  check_rstbl() validates restart table structure, but does not constrain per-entry lcns_follow values relative to the entry size. A malformed filesystem image can provide an oversized lcns_follow value, causing the conversion memmove() to access memory beyond the bounds of the allocated restart table buffer.  The same field is later used to bound iteration over page_lcns[], so validating lcns_follow during conversion also prevents downstream out-of-bounds access from the same malformed metadata.  Compute the maximum valid lcns_follow from the already-validated restart table entry size and reject entries that exceed this bound. Reuse the existing t16/t32 scratch variables already declared in log_replay() to avoid introducing new declarations.  [almaz.alexandrovich@paragon-software.com: fixed the conflicts]",
  "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": 0.0014,
  "epssPercentile": 0.03384,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
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      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2058",
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      "released": "2026-08-17T09:00:00Z"
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      "released": "2026-08-31T09:00:00Z"
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      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2071",
      "released": "2026-08-31T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "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"
  }
}