{
  "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: fix out-of-bounds read in read_log_rec_buf()  read_log_rec_buf() copies a log record into a caller buffer starting at  \tu32 off = lsn_to_page_off(log, lsn) + log-\u003erecord_header_len;  log-\u003erecord_header_len (and log-\u003edata_off, used for the following pages) comes verbatim from the on-disk restart area and is only checked for 8-byte alignment in is_rst_area_valid(), so off can exceed log-\u003epage_size. \"tail = log-\u003epage_size - off\" then underflows and memcpy() reads past the page_size-sized buffer returned by read_log_page(), spilling adjacent slab memory into the replay buffer.  This is reachable by mounting a crafted NTFS image:   BUG: KASAN: slab-out-of-bounds in read_log_rec_buf+0x216/0x580  Read of size 64 at addr ffff88800a877ff8 by task exploit/127   read_log_rec_buf fs/ntfs3/fslog.c:2299   log_replay fs/ntfs3/fslog.c:4216   ntfs_loadlog_and_replay fs/ntfs3/fsntfs.c:324   ntfs_fill_super fs/ntfs3/super.c:1392   get_tree_bdev_flags fs/super.c:1694   __x64_sys_mount fs/namespace.c:4360  The buggy address is located 4088 bytes to the right of  the 4096-byte region [ffff88800a876000, ffff88800a877000)  Reject an in-page offset outside the current page before the copy.  [almaz.alexandrovich@paragon-software.com: replaced the \u003e= sign with \u003e]",
  "id": "DEBIAN-CVE-2026-89781",
  "modified": "2026-09-17T04:47:31.495945384Z",
  "published": "2026-09-16T09:17:08.667Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-89781"
    }
  ],
  "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-2026-89781"
  ]
}