{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix node_cnt race between extent node destroy and writeback\n\nf2fs_destroy_extent_node() does not set FI_NO_EXTENT before clearing\nextent nodes. When called from f2fs_drop_inode() with I_SYNC set,\nconcurrent kworker writeback can insert new extent nodes into the same\nextent tree, racing with the destroy and triggering f2fs_bug_on() in\n__destroy_extent_node(). The scenario is as follows:\n\ndrop inode                            writeback\n - iput\n  - f2fs_drop_inode  // I_SYNC set\n   - f2fs_destroy_extent_node\n    - __destroy_extent_node\n     - while (node_cnt) {\n        write_lock(\u0026et-\u003elock)\n        __free_extent_tree\n        write_unlock(\u0026et-\u003elock)\n                                       - __writeback_single_inode\n                                        - f2fs_outplace_write_data\n                                         - f2fs_update_read_extent_cache\n                                          - __update_extent_tree_range\n                                           // FI_NO_EXTENT not set,\n                                           // insert new extent node\n       } // node_cnt == 0, exit while\n     - f2fs_bug_on(node_cnt)  // node_cnt \u003e 0\n\nAdditionally, __update_extent_tree_range() only checks FI_NO_EXTENT for\nEX_READ type, leaving EX_BLOCK_AGE updates completely unprotected.\n\nThis patch set FI_NO_EXTENT under et-\u003elock in __destroy_extent_node(),\nconsistent with other callers (__update_extent_tree_range and\n__drop_extent_tree) and check FI_NO_EXTENT for both EX_READ and\nEX_BLOCK_AGE tree."
    }
  ],
  "id": "CVE-2026-46194",
  "lastModified": "2026-05-28T13:44:01.663",
  "metrics": {},
  "published": "2026-05-28T10:16:35.033",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0559a0e962aacbb47519e26ee663be04b72dcb92"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/42dd1c91f993431d0b399502479d00e6ad1bca71"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ab1eaf9d5c99042f5b0243bf67a06283a4c0757f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b0e4395870eb3441ddc959f6710b5f6ca61aff26"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ed78aeebef05212ef7dca93bd931e4eff67c113f"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-46194"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-28T10:16:35Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix node_cnt race between extent node destroy and writeback\n\nf2fs_destroy_extent_node() does not set FI_NO_EXTENT before clearing\nextent nodes. When called from f2fs_drop_inode() with I_SYNC set,\nconcurrent kworker writeback can insert new extent nodes into the same\nextent tree, racing with the destroy and triggering f2fs_bug_on() in\n__destroy_extent_node(). The scenario is as follows:\n\ndrop inode                            writeback\n - iput\n  - f2fs_drop_inode  // I_SYNC set\n   - f2fs_destroy_extent_node\n    - __destroy_extent_node\n     - while (node_cnt) {\n        write_lock(\u0026et-\u003elock)\n        __free_extent_tree\n        write_unlock(\u0026et-\u003elock)\n                                       - __writeback_single_inode\n                                        - f2fs_outplace_write_data\n                                         - f2fs_update_read_extent_cache\n                                          - __update_extent_tree_range\n                                           // FI_NO_EXTENT not set,\n                                           // insert new extent node\n       } // node_cnt == 0, exit while\n     - f2fs_bug_on(node_cnt)  // node_cnt \u003e 0\n\nAdditionally, __update_extent_tree_range() only checks FI_NO_EXTENT for\nEX_READ type, leaving EX_BLOCK_AGE updates completely unprotected.\n\nThis patch set FI_NO_EXTENT under et-\u003elock in __destroy_extent_node(),\nconsistent with other callers (__update_extent_tree_range and\n__drop_extent_tree) and check FI_NO_EXTENT for both EX_READ and\nEX_BLOCK_AGE tree.",
  "id": "GHSA-fjrm-vjgq-9rp6",
  "modified": "2026-05-28T12:30:32Z",
  "published": "2026-05-28T12:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46194"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0559a0e962aacbb47519e26ee663be04b72dcb92"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/42dd1c91f993431d0b399502479d00e6ad1bca71"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab1eaf9d5c99042f5b0243bf67a06283a4c0757f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b0e4395870eb3441ddc959f6710b5f6ca61aff26"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ed78aeebef05212ef7dca93bd931e4eff67c113f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

{
  "document": {
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2026-46194 f2fs: fix node_cnt race between extent node destroy and writeback - VEX",
        "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-46194.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "f2fs: fix node_cnt race between extent node destroy and writeback",
    "tracking": {
      "current_release_date": "2026-05-29T01:03:31.000Z",
      "generator": {
        "date": "2026-05-29T07:23:45.836Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2026-46194",
      "initial_release_date": "2026-05-02T00:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-05-29T01:03:31.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "3.0",
                "product": {
                  "name": "Azure Linux 3.0",
                  "product_id": "17084"
                }
              }
            ],
            "category": "product_name",
            "name": "Azure Linux"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-46194",
      "notes": [
        {
          "category": "general",
          "text": "Linux",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "under_investigation": [
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-46194 f2fs: fix node_cnt race between extent node destroy and writeback - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-46194.json"
        }
      ],
      "title": "f2fs: fix node_cnt race between extent node destroy and writeback"
    }
  ]
}