{
  "cveId": "CVE-2026-89782",
  "url": "https://patchblox.com/security/cve/CVE-2026-89782",
  "summary": "CVE-2026-89782 is fixed in 57 products on 1 platform, first by DEBIAN-CVE-2026-89782, 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: reject restart table growth beyond U16...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  fs/ntfs3: reject restart table growth beyond U16_MAX entries  During $LogFile replay, log_replay() indexes the transaction table by the transact_id taken from the log record header.  check_log_rec() only verifies that transact_id is non-zero and properly aligned, not its magnitude, so a crafted image can request an arbitrarily large index.  alloc_rsttbl_from_idx() grows the table to cover that index via extend_rsttbl(), which passes the new entry count to init_rsttbl():  \trt = init_rsttbl(esize, used \u002B add);  used \u002B add is computed as u32 but init_rsttbl() takes a u16, and the count is stored in struct RESTART_TABLE as a __le16.  When used \u002B add exceeds U16_MAX it is truncated, init_rsttbl() allocates a table far smaller than the index requires, and alloc_rsttbl_from_idx() then dereferences and writes at the original, untruncated offset -- an out-of-bounds access past the allocation, reachable by mounting a crafted NTFS image.   BUG: KASAN: use-after-free in alloc_rsttbl_from_idx (fs/ntfs3/fslog.c:950)  Read of size 4 at addr ffff8880327ffff8 by task exploit   alloc_rsttbl_from_idx (fs/ntfs3/fslog.c:950)   log_replay (fs/ntfs3/fslog.c:4562)   ntfs_loadlog_and_replay (fs/ntfs3/fsntfs.c:324)   ntfs_fill_super (fs/ntfs3/super.c:1393)   get_tree_bdev_flags   vfs_get_tree   path_mount   __x64_sys_mount  A restart table is limited to U16_MAX entries by its __le16 count, so a larger growth request is invalid input.  Reject it in extend_rsttbl(); all callers already handle a NULL return.",
  "published": "2026-09-16T09:17:08Z",
  "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": 0.0018,
  "epssPercentile": 0.0759,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
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      "released": "2026-11-07T01:06:07Z"
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  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}