{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b46acd6a6a627d876898e1c84d3f84902264b445"
            },
            {
              "fixed": "964c3fae1dfc49dde5468eace940f199cda234e9"
            },
            {
              "fixed": "3aa96956ca2200674e2a8f9c23ec6ecd45e5010f"
            },
            {
              "fixed": "946046841013ebac8492ef49651c53638d7a9a6a"
            },
            {
              "fixed": "c6f9e804f73ef809529865fbc7256dd189ff8c33"
            },
            {
              "fixed": "cf28fc1658463d768657cf1c27a83980d4ba7ef2"
            },
            {
              "fixed": "f433acc85b86f327d03ba8b03a33c105c51053de"
            },
            {
              "fixed": "57382ec6ac63b63dce2789e835fded28b698ae79"
            }
          ],
          "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": "6.12.96"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.39"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64432.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: validate Dirty Page Table capacity in log_replay copy_lcns\n\nIn the analysis pass of $LogFile journal replay, log_replay() copies\nLCNs from each action log record into an existing Dirty Page Table\n(DPT) entry without bounding the destination index. A crafted NTFS\nimage with DPT entry lcns_follow=1 and an action log record with\nlcns_follow=2 produces a kernel slab out-of-bounds write at mount\ntime:\n\n  BUG: KASAN: slab-out-of-bounds in log_replay+0x654c/0xdb60\n  Write of size 8 at addr ffff8880095e1040 by task mount\n\nTwo attacker-controlled fields can drive j+i past the allocated\npage_lcns[] array:\n\n  1. dp-\u003elcns_follow (capacity) can be smaller than lrh-\u003elcns_follow.\n  2. lrh-\u003etarget_vcn may be smaller than dp-\u003evcn, making the u64\n     subtraction wrap to a huge size_t.\n\nValidate target VCN delta and per-record LCN count against the\nDPT entry capacity, bail via the existing out: cleanup label with\n-EINVAL.\n\nThis mirrors the bounds-check pattern added in commit b2bc7c44ed17\n(\"fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot\")\nand commit 0ca0485e4b2e (\"fs/ntfs3: validate rec-\u003eused in\njournal-replay file record check\").",
  "id": "CVE-2026-64432",
  "modified": "2026-07-28T03:55:44.105261289Z",
  "published": "2026-07-25T08:51:07.791Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3aa96956ca2200674e2a8f9c23ec6ecd45e5010f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/57382ec6ac63b63dce2789e835fded28b698ae79"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/946046841013ebac8492ef49651c53638d7a9a6a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/964c3fae1dfc49dde5468eace940f199cda234e9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6f9e804f73ef809529865fbc7256dd189ff8c33"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf28fc1658463d768657cf1c27a83980d4ba7ef2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f433acc85b86f327d03ba8b03a33c105c51053de"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64432.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64432"
    },
    {
      "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: validate Dirty Page Table capacity in log_replay copy_lcns"
}