{
  "cveId": "CVE-2026-64432",
  "url": "https://patchblox.com/security/cve/CVE-2026-64432",
  "summary": "CVE-2026-64432 is fixed in 57 products on 1 platform, first by DEBIAN-CVE-2026-64432, released July 26, 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 Dirty Page Table capacity in...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  fs/ntfs3: validate Dirty Page Table capacity in log_replay copy_lcns  In the analysis pass of $LogFile journal replay, log_replay() copies LCNs from each action log record into an existing Dirty Page Table (DPT) entry without bounding the destination index. A crafted NTFS image with DPT entry lcns_follow=1 and an action log record with lcns_follow=2 produces a kernel slab out-of-bounds write at mount time:    BUG: KASAN: slab-out-of-bounds in log_replay\u002B0x654c/0xdb60   Write of size 8 at addr ffff8880095e1040 by task mount  Two attacker-controlled fields can drive j\u002Bi past the allocated page_lcns[] array:    1. dp-\u003Elcns_follow (capacity) can be smaller than lrh-\u003Elcns_follow.   2. lrh-\u003Etarget_vcn may be smaller than dp-\u003Evcn, making the u64      subtraction wrap to a huge size_t.  Validate target VCN delta and per-record LCN count against the DPT entry capacity, bail via the existing out: cleanup label with -EINVAL.  This mirrors the bounds-check pattern added in commit b2bc7c44ed17 (\u0022fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot\u0022) and commit 0ca0485e4b2e (\u0022fs/ntfs3: validate rec-\u003Eused in journal-replay file record check\u0022).",
  "published": "2026-07-25T10:17:27Z",
  "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": 0.00135,
  "epssPercentile": 0.03024,
  "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"
  }
}