{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f1c5aa614b5c251f93a6a4c8c26001d5e9e53fd6"
            },
            {
              "fixed": "dff07cc98fdf6af57a7c054dc09b2050a9d5c287"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "f76d4c28a46a9260d85e00dafc8f46d369365d33"
            },
            {
              "fixed": "2b2fee890250ab647a601124471a334bb01a0790"
            },
            {
              "fixed": "bbd943d6a2d566428324b516a37f98328dfb802d"
            },
            {
              "fixed": "981fcc5674e67158d24d23e841523eccba19d0e7"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "1bb7a4b6b3d7dd8da6f5a9d0529d42c22a359e71"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.12.31"
            },
            {
              "fixed": "6.12.86"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.14.9"
            },
            {
              "fixed": "6.15"
            }
          ],
          "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": "6.12.86"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.27"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.15.0"
            },
            {
              "fixed": "7.0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46061.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\njbd2: fix deadlock in jbd2_journal_cancel_revoke()\n\nCommit f76d4c28a46a (\"fs/jbd2: use sleeping version of\n__find_get_block()\") changed jbd2_journal_cancel_revoke() to use\n__find_get_block_nonatomic() which holds the folio lock instead of\ni_private_lock. This breaks the lock ordering (folio -\u003e buffer) and\ncauses an ABBA deadlock when the filesystem blocksize \u003c pagesize:\n\n     T1                                T2\next4_mkdir()\n ext4_init_new_dir()\n  ext4_append()\n   ext4_getblk()\n    lock_buffer()    \u003c- A\n                                   sync_blockdev()\n                                    blkdev_writepages()\n                                     writeback_iter()\n                                      writeback_get_folio()\n                                       folio_lock()   \u003c- B\n     ext4_journal_get_create_access()\n      jbd2_journal_cancel_revoke()\n       __find_get_block_nonatomic()\n        folio_lock()  \u003c- B\n                                     block_write_full_folio()\n                                      lock_buffer()   \u003c- A\n\nThis can occasionally cause generic/013 to hang.\n\nFix by only calling __find_get_block_nonatomic() when the passed\nbuffer_head doesn't belong to the bdev, which is the only case that we\nneed to look up its bdev alias. Otherwise, the lookup is redundant since\nthe found buffer_head is equal to the one we passed in.",
  "id": "CVE-2026-46061",
  "modified": "2026-07-15T01:49:10.696017412Z",
  "published": "2026-05-27T12:57:22.041Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2b2fee890250ab647a601124471a334bb01a0790"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/981fcc5674e67158d24d23e841523eccba19d0e7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bbd943d6a2d566428324b516a37f98328dfb802d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dff07cc98fdf6af57a7c054dc09b2050a9d5c287"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46061.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46061"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "jbd2: fix deadlock in jbd2_journal_cancel_revoke()"
}