{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "82cae269cfa953032fbb8980a7d554d60fb00b17"
            },
            {
              "fixed": "eb80003744e32a7366a523015e4acfe0a2ac7d88"
            },
            {
              "fixed": "bd631e2005290a55c8edda87363bc0d594c01705"
            },
            {
              "fixed": "94fce1d3e74fe011e21f17490ba58491709fd7e5"
            },
            {
              "fixed": "66c074eab6f966fbe48a0fc4b3a45b2a2e2df527"
            },
            {
              "fixed": "64bb6000bfbdf241a6dd578199acd90321a4243e"
            },
            {
              "fixed": "72caafbc95c5dca8266a942b8e96ad81d8d9adc7"
            },
            {
              "fixed": "2064bc663f89e61b8681c1fb9d1ce445de72063d"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.15.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89785.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: fix out-of-bounds read of INDEX_ROOT in reparse/objid init\n\nntfs_reparse_init() and ntfs_objid_init() parse the index root of the\n$Extend/$Reparse and $Extend/$ObjId metafiles (the INDEX_ROOT attributes\nnamed $R and $O). They read its type and rule fields through\nresident_data(), which does not check that the resident attribute is\nlarge enough to hold them.\n\nmi_enum_attr() accepts a resident attribute with data_off == asize and\ndata_size == 0. For such an attribute placed last in its MFT record,\nresident_data() returns a pointer to the end of the record_size buffer,\nso reading root-\u003etype / root-\u003erule reads past the allocation.\n\nUse resident_data_ex(attr, sizeof(struct INDEX_ROOT)) and bail out when\nit returns NULL, as ntfs_security_init() already does for $SDH / $SII.\n\nThe attribute is only parsed while mounting a crafted image, so this\nneeds CAP_SYS_ADMIN.\n\n BUG: KASAN: slab-out-of-bounds in ntfs_reparse_init (fs/ntfs3/fsntfs.c:2306)\n Read of size 4 at addr ffff88801219dc00 by task mount\n  ntfs_reparse_init (fs/ntfs3/fsntfs.c:2306)\n  ntfs_fill_super (fs/ntfs3/super.c:1604)\n  get_tree_bdev_flags (fs/super.c:1703)\n  vfs_get_tree (fs/super.c:1758)\n  path_mount (fs/namespace.c:4131)\n  __x64_sys_mount (fs/namespace.c:4360)",
  "id": "CVE-2026-89785",
  "modified": "2026-09-18T03:30:35.263948897Z",
  "published": "2026-09-16T08:48:23.084Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2064bc663f89e61b8681c1fb9d1ce445de72063d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/64bb6000bfbdf241a6dd578199acd90321a4243e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/66c074eab6f966fbe48a0fc4b3a45b2a2e2df527"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/72caafbc95c5dca8266a942b8e96ad81d8d9adc7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/94fce1d3e74fe011e21f17490ba58491709fd7e5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd631e2005290a55c8edda87363bc0d594c01705"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb80003744e32a7366a523015e4acfe0a2ac7d88"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89785.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89785"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "fs/ntfs3: fix out-of-bounds read of INDEX_ROOT in reparse/objid init"
}