{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b46acd6a6a627d876898e1c84d3f84902264b445"
            },
            {
              "fixed": "b20e5a709d8bd190d6e4645606763c7423e694c1"
            },
            {
              "fixed": "d41b382068ca4e64e421f736cdd700095464b6ac"
            },
            {
              "fixed": "429d653ca641d38a78609b8f62e81a0a5c780a2d"
            },
            {
              "fixed": "315d3a9a48b49f889da3d858a9307e677cb9e1bd"
            },
            {
              "fixed": "be306b8d9143a9c076c804a7ca025d69caf9c448"
            },
            {
              "fixed": "36feda687afebae24c472202694448738809c411"
            },
            {
              "fixed": "3e127829e57f5190f612412ece4541cb96d5ec7a"
            }
          ],
          "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": "5.15.212"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64532.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: bound NTFS_DE view.data_off in UpdateRecordData{Root,Allocation}\n\nIn do_action()'s UpdateRecordDataRoot (fslog.c:3489) and\nUpdateRecordDataAllocation (fslog.c:3697) cases, the memmove\ndestination is `Add2Ptr(e, le16_to_cpu(e-\u003eview.data_off))`,\nwhere e-\u003eview.data_off comes from an on-disk NTFS_DE inside\nan INDEX_ROOT or INDEX_BUFFER.  Neither case validates\nview.data_off + dlen against e-\u003esize; the existing\ncheck_if_index_root / check_if_alloc_index helpers walk the\nentry chain and validate the entry's offset, but not its\ninternal view fields.\n\nThe neighbouring read sites (e.g., fs/ntfs3/index.c when\niterating view entries) check view.data_off + view.data_size\n\u003c= e-\u003esize.  Apply the same bound at the two memmove sites.\n\nReproduced under UML+KASAN on mainline 8d90b09e6741 via\npr_warn-only probe instrumentation: with view.data_off forced\nto 0xFFFC, the memmove writes 32 bytes past the end of the\nNTFS_DE.\n\nThis is similar in shape to Pavitra Jha's 2026-05-02 patch\n\"fs/ntfs3: prevent oob in case UpdateRecordDataRoot\"\n(\u003c20260502105008.21827-1-jhapavitra98@gmail.com\u003e) which\nproposes calling ntfs3_bad_de_range(); that helper does not\nexist in mainline.  This patch uses inline checks.",
  "id": "CVE-2026-64532",
  "modified": "2026-07-31T03:34:09.752070731Z",
  "published": "2026-07-27T06:32:33.159Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/315d3a9a48b49f889da3d858a9307e677cb9e1bd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/36feda687afebae24c472202694448738809c411"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3e127829e57f5190f612412ece4541cb96d5ec7a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/429d653ca641d38a78609b8f62e81a0a5c780a2d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b20e5a709d8bd190d6e4645606763c7423e694c1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be306b8d9143a9c076c804a7ca025d69caf9c448"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d41b382068ca4e64e421f736cdd700095464b6ac"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64532.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64532"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "fs/ntfs3: bound NTFS_DE view.data_off in UpdateRecordData{Root,Allocation}"
}