{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "5fc982fe7eca9d0cf7b25832450ebd4f7c8e1c36"
            },
            {
              "fixed": "b014372b62237521444ee51384549bdf48b79015"
            },
            {
              "fixed": "b8d22d9d8260b0f4f4d8e2898c98037c9982ea66"
            },
            {
              "fixed": "08ce2fee1b869ecbfbd94e0eb2630e52203a2e03"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "57f7979aefdcef66326bda47e07ee0d8be64bf21"
            },
            {
              "last_affected": "db7fc56646cafe39599a4c21f1398e2bdfd5c185"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.6.66"
            },
            {
              "fixed": "6.7"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.12.5"
            },
            {
              "fixed": "6.13"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.16"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43127.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs3: fix circular locking dependency in run_unpack_ex\n\nSyzbot reported a circular locking dependency between wnd-\u003erw_lock\n(sbi-\u003eused.bitmap) and ni-\u003efile.run_lock.\n\nThe deadlock scenario:\n1. ntfs_extend_mft() takes ni-\u003efile.run_lock then wnd-\u003erw_lock.\n2. run_unpack_ex() takes wnd-\u003erw_lock then tries to acquire\n   ni-\u003efile.run_lock inside ntfs_refresh_zone().\n\nThis creates an AB-BA deadlock.\n\nFix this by using down_read_trylock() instead of down_read() when\nacquiring run_lock in run_unpack_ex(). If the lock is contended,\nskip ntfs_refresh_zone() - the MFT zone will be refreshed on the\nnext MFT operation. This breaks the circular dependency since we\nnever block waiting for run_lock while holding wnd-\u003erw_lock.",
  "id": "CVE-2026-43127",
  "modified": "2026-07-15T01:48:51.240098200Z",
  "published": "2026-05-06T11:27:16.794Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/08ce2fee1b869ecbfbd94e0eb2630e52203a2e03"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b014372b62237521444ee51384549bdf48b79015"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b8d22d9d8260b0f4f4d8e2898c98037c9982ea66"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43127.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43127"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "ntfs3: fix circular locking dependency in run_unpack_ex"
}