{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b46acd6a6a627d876898e1c84d3f84902264b445"
            },
            {
              "fixed": "9b3d8cc9d54fcded4de51b2b1026ae7182512077"
            },
            {
              "fixed": "9b7c28d8c61bdb041936222a09a708531a1c2921"
            },
            {
              "fixed": "0f13e823bf86bd1800168ea0bb5bca8b8500a81c"
            },
            {
              "fixed": "d240cd98f5f7b65c90f6b2b6abe3232ccdc405ab"
            },
            {
              "fixed": "49c86dae0c0ccb8d98ddcdc46987259389c816dd"
            },
            {
              "fixed": "5e7b598660cfa8e5af172cf4c65cffc126333307"
            }
          ],
          "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": "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/2026/72xxx/CVE-2026-72196.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: bound copy_lcns dp-\u003epage_lcns[] index in analysis pass\n\nIn log_replay()'s analysis pass, after find_dp() returns a\nvalid DIR_PAGE_ENTRY for the (target_attr, target_vcn) tuple,\nthe copy_lcns block walks lrh-\u003elcns_follow further entries:\n\n\tt16 = le16_to_cpu(lrh-\u003elcns_follow);\n\tfor (i = 0; i \u003c t16; i++) {\n\t    size_t j = (size_t)(le64_to_cpu(lrh-\u003etarget_vcn) -\n\t                        le64_to_cpu(dp-\u003evcn));\n\t    dp-\u003epage_lcns[j + i] = lrh-\u003epage_lcns[i];\n\t}\n\nfind_dp() only validates that target_vcn falls within\n[dp-\u003evcn, dp-\u003evcn + dp-\u003elcns_follow), i.e., that the FIRST\ncluster is covered.  The walk through the further entries is\nnot bounded against dp-\u003elcns_follow.  For a malformed LRH\nwhere target_vcn = dp-\u003evcn + dp-\u003elcns_follow - 1 and\nlrh-\u003elcns_follow \u003e 1, the i \u003e 0 writes overflow the dp's\nallocated page_lcns[] array.\n\nAdd the missing j + lrh-\u003elcns_follow \u003c= dp-\u003elcns_follow guard.\n\nReproduced under UML+KASAN on mainline 8d90b09e6741 as a\nslab-out-of-bounds write of size 8 from log_replay+0x68d4 on\nthe mount path.\n\nThis is distinct from Pavitra Jha's 2026-05-02 patch\n(\"fs/ntfs3: validate lcns_follow in log_replay conversion\",\n\u003c20260502154252.164586-1-jhapavitra98@gmail.com\u003e) which\naddresses the separate version-0 dirty-page-table conversion\npath's memmove(\u0026dp-\u003evcn, ...) call.  The two fixes are\ncomplementary; both should land.\n\n[almaz.alexandrovich@paragon-software.com: clang-formatted the changes,\nfixed conflicts]",
  "id": "CVE-2026-72196",
  "modified": "2026-08-18T03:31:14.873932083Z",
  "published": "2026-08-15T05:53:55.509Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0f13e823bf86bd1800168ea0bb5bca8b8500a81c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/49c86dae0c0ccb8d98ddcdc46987259389c816dd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e7b598660cfa8e5af172cf4c65cffc126333307"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b3d8cc9d54fcded4de51b2b1026ae7182512077"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b7c28d8c61bdb041936222a09a708531a1c2921"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d240cd98f5f7b65c90f6b2b6abe3232ccdc405ab"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72196.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72196"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "fs/ntfs3: bound copy_lcns dp-\u003epage_lcns[] index in analysis pass"
}