fs/ntfs3: prevent infinite loops caused by the next valid being the same

{
  "id": "00317e7852edf0aa76a61a7585e5098f72abb0be95117553eb8fb970aadc317d",
  "url": "https://osv.dev/vulnerability/CVE-2026-45864",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "fs/ntfs3: prevent infinite loops caused by the next valid being the same",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: prevent infinite loops caused by the next valid being the same When processing valid within the range [valid : pos), if valid cannot be retrieved correctly, for example, if the retrieved valid value is always the same, this can trigger a potential infinite loop, similar to the hung problem reported by syzbot [1]. Adding a check for the valid value within the loop body, and terminating the loop and returning -EINVAL if the value is the same as the current value, can prevent this. [1] INFO: task syz.4.21:6056 blocked for more than 143 seconds. Call Trace: rwbase_write_lock+0x14f/0x750 kernel/locking/rwbase_rt.c:244 inode_lock include/linux/fs.h:1027 [inline] ntfs_file_write_iter+0xe6/0x870 fs/ntfs3/file.c:1284",
    "evidence": "osv:CVE-2026-45864",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.202",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.165",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.128",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.75",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.14",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-45864",
      "aliases": [
        "CVE-2026-45864"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                {
                  "fixed": "50c822fcb36768f1fb356f05b02a2248ef81936d"
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                {
                  "fixed": "6d93239b4fc479f7c0a412dd196ec0ca2672d14a"
                },
                {
                  "fixed": "71c8b966ec56e13c02388c1312910588bb49be7a"
                },
                {
                  "fixed": "b97e371e5d1c13d722335d46eb8bc1a22b272a0e"
                },
                {
                  "fixed": "4bf3bafb8e0635ed93e3cd4156dcbcc0fb960cb4"
                },
                {
                  "fixed": "a47a2bb9aa6455d5cee1045814a60c749309c92b"
                },
                {
                  "fixed": "27b75ca4e51e3e4554dc85dbf1a0246c66106fd3"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45864.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "5.15.0"
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                  "fixed": "5.15.202"
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                  "introduced": "6.2.0"
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                  "introduced": "6.7.0"
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            {
              "type": "ECOSYSTEM",
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                  "introduced": "6.13.0"
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                {
                  "fixed": "6.18.14"
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            {
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                  "introduced": "6.19.0"
                },
                {
                  "fixed": "6.19.4"
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              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45864.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:21.787928942Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/27b75ca4e51e3e4554dc85dbf1a0246c66106fd3",
        "https://git.kernel.org/stable/c/4bf3bafb8e0635ed93e3cd4156dcbcc0fb960cb4",
        "https://git.kernel.org/stable/c/50c822fcb36768f1fb356f05b02a2248ef81936d",
        "https://git.kernel.org/stable/c/6d93239b4fc479f7c0a412dd196ec0ca2672d14a",
        "https://git.kernel.org/stable/c/71c8b966ec56e13c02388c1312910588bb49be7a",
        "https://git.kernel.org/stable/c/a47a2bb9aa6455d5cee1045814a60c749309c92b",
        "https://git.kernel.org/stable/c/b97e371e5d1c13d722335d46eb8bc1a22b272a0e",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45864.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-45864",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45864.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-45864",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 487504,
  "published_at": "2026-05-27T12:15:43.807+00:00"
}