{
  "cveId": "CVE-2026-89616",
  "url": "https://patchblox.com/security/cve/CVE-2026-89616",
  "summary": "CVE-2026-89616 is fixed in 57 products on 1 platform, first by DEBIAN-CVE-2026-89616, released September 23, 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: fix info-leak on partial LZNT decompre...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  fs/ntfs3: fix info-leak on partial LZNT decompress in ni_read_frame()  ni_read_frame() decompresses an LZNT $DATA frame into the vmapped target pages and then trusts decompress_lznt()\u0027s return value:    unc_size = decompress_lznt(frame_ondisk, ondisk_size, frame_mem,                              frame_size);   if ((ssize_t)unc_size \u003C 0)        err = unc_size;   else if (!unc_size || unc_size \u003E frame_size)  err = -EINVAL;  decompress_lznt() stops as soon as the compressed stream is exhausted (e.g. a zero chunk header) and returns the number of bytes it actually wrote, which may be far less than frame_size. The bytes between unc_size and frame_size are never written. The only memset() that follows zeroes the region beyond i_valid; when the frame lies entirely within the file\u0027s valid size that memset() does not run, so the gap retains whatever was in the just-vmapped pages. All pages are then marked uptodate and returned to userspace, disclosing uninitialized (recently-freed) kernel page memory. A crafted compressed file whose stream decompresses to only a few bytes leaks the remainder of every frame on a plain read(2), which is enough to recover kernel pointers and defeat KASLR.  Zero the [unc_size, frame_size) tail immediately after a successful LZNT decompress so the remainder reads back as zero.",
  "published": "2026-09-11T20:19:46Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
  "epss": 0.00415,
  "epssPercentile": 0.36098,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
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  "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"
  }
}