{
  "cveId": "CVE-2026-31716",
  "url": "https://patchblox.com/security/cve/CVE-2026-31716",
  "summary": "CVE-2026-31716 is fixed in 56 products on 1 platform, first by ALAS2023-2026-1693, released May 8, 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 rec-\u003Eused in journal-replay f...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  fs/ntfs3: validate rec-\u003Eused in journal-replay file record check  check_file_record() validates rec-\u003Etotal against the record size but never validates rec-\u003Eused.  The do_action() journal-replay handlers read rec-\u003Eused from disk and use it to compute memmove lengths:    DeleteAttribute:    memmove(attr, ..., used - asize - roff)   CreateAttribute:    memmove(..., attr, used - roff)   change_attr_size:   memmove(..., used - PtrOffset(rec, next))  When rec-\u003Eused is smaller than the offset of a validated attribute, or larger than the record size, these subtractions can underflow allowing us to copy huge amounts of memory in to a 4kb buffer, generally considered a bad idea overall.  This requires a corrupted filesystem, which isn\u0027t a threat model the kernel really needs to worry about, but checking for such an obvious out-of-bounds value is good to keep things robust, especially on journal replay  Fix this up by bounding rec-\u003Eused correctly.  This is much like commit b2bc7c44ed17 (\u0022fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot\u0022) which checked different values in this same switch statement.",
  "published": "2026-05-01T14:16:21Z",
  "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": 0.00128,
  "epssPercentile": 0.02496,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
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      "product": "python3-perf6.12",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.90-120.164.amzn2023",
      "fix": "ALAS2023-2026-1816",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1816",
      "released": "2026-06-08T09:00:00Z"
    },
    {
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      "product": "python3-perf6.12-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:6.12.90-120.164.amzn2023",
      "fix": "ALAS2023-2026-1816",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1816",
      "released": "2026-06-08T09:00:00Z"
    },
    {
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      "product": "python3-perf6.18",
      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-1693",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1693",
      "released": "2026-05-08T18:00:00Z"
    },
    {
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      "release": "amzn 2023",
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      "fix": "ALAS2023-2026-1693",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1693",
      "released": "2026-05-08T18:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}