{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "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 + add);  used + 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 + 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.",
  "id": "DEBIAN-CVE-2026-89782",
  "modified": "2026-09-17T04:47:38.118448695Z",
  "published": "2026-09-16T09:17:08.800Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-89782"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-89782"
  ]
}