{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.5-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  ntfs: fix u16 truncation of restart-area length check  ntfs_check_restart_area() validates that the $LogFile restart area and its trailing log client record array fit within the system page size:          u16 ra_ofs, ra_len, ca_ofs;         ...         ra_len = ca_ofs + le16_to_cpu(ra-\u003elog_clients) *                         sizeof(struct log_client_record);         if (ra_ofs + ra_len \u003e le32_to_cpu(rp-\u003esystem_page_size) || ...)                 return false;  ra_len is u16, but the right-hand side is computed in size_t (sizeof(struct log_client_record) == 160). Both ca_ofs and log_clients come straight from the on-disk restart area. With an on-disk log_clients of 410 the product 410 * 160 = 65600; adding ca_ofs and storing into the u16 ra_len truncates modulo 65536 (e.g. ca_ofs 64 gives ra_len 128), so the \"fits in the page\" check passes even though the client array described by log_clients extends far beyond the page.  ntfs_check_log_client_array() then walks the array bounded only by the on-disk log_clients count:          cr = ca + idx;         if (cr-\u003eprev_client != LOGFILE_NO_CLIENT) ...  For log_clients 410 it dereferences records up to ca + 409 * 160, ~64 KiB past the kvzalloc(system_page_size) restart-page buffer -- an out-of-bounds read of attacker-controlled extent, reachable when a crafted NTFS image is mounted (load_and_check_logfile() at mount time). This is the in-kernel analogue of CVE-2022-30789, fixed in the ntfs-3g userspace driver but never in this revived classic driver.  Compute the restart-area length in a u32 so the existing bounds check rejects an over-large client array instead of being defeated by the truncation. Widen ra_ofs and ca_ofs to u32 as well: both are loaded from __le16 on-disk fields and every comparison already promotes to int/size_t, so this changes no result and keeps the declaration uniform.",
  "id": "DEBIAN-CVE-2026-80672",
  "modified": "2026-09-14T16:47:42.904071493Z",
  "published": "2026-08-28T08:16:52.510Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-80672"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-80672"
  ]
}