{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "295b50e95e900da31ff237e46e04525fa799b2cf"
            },
            {
              "fixed": "42dd1c91f993431d0b399502479d00e6ad1bca71"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "924f7dd1e832e4e4530d14711db223d2803f7b61"
            },
            {
              "fixed": "ab1eaf9d5c99042f5b0243bf67a06283a4c0757f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "3fc5d5a182f6a1f8bd4dc775feb54c369dd2c343"
            },
            {
              "fixed": "b0e4395870eb3441ddc959f6710b5f6ca61aff26"
            },
            {
              "fixed": "0559a0e962aacbb47519e26ee663be04b72dcb92"
            },
            {
              "fixed": "ed78aeebef05212ef7dca93bd931e4eff67c113f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.6.66"
            },
            {
              "fixed": "6.6.140"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.12.5"
            },
            {
              "fixed": "6.12.88"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.6.140"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.88"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.30"
            },
            {
              "fixed": "7.0.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46194.json"
  },
  "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": "CVE-2026-46194",
  "modified": "2026-07-08T05:36:08.374422933Z",
  "published": "2026-05-28T09:36:47.461Z",
  "references": [
    {
      "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"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46194.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46194"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "f2fs: fix node_cnt race between extent node destroy and writeback"
}