{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2"
            },
            {
              "fixed": "0892f12cd49fde5d5db68137923db107f894f3a3"
            },
            {
              "fixed": "5a63033696e60b5d70816f1d119645ac5b0b0a03"
            },
            {
              "fixed": "9c90449a9ac2cd1ba540ad2561b8b70c1bfb0a25"
            },
            {
              "fixed": "ca99cbcc316cdfd2040cc2b13d1426ccb3b3b50b"
            },
            {
              "fixed": "19782b4c793b49a6aa4abbb307ddff3610009d21"
            },
            {
              "fixed": "f7817ad399d604e8639005d87d148b5ec626ad26"
            },
            {
              "fixed": "c426231e3d51916e83b6d1ab7ed8a65e83bca5b4"
            },
            {
              "fixed": "ec0a7500d8eace5b4f305fa0c594dd148f0e8d29"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.10.0"
            },
            {
              "fixed": "5.10.253"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.203"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.168"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.131"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.80"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.21"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43066.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix iloc.bh leak in ext4_fc_replay_inode() error paths\n\nDuring code review, Joseph found that ext4_fc_replay_inode() calls\next4_get_fc_inode_loc() to get the inode location, which holds a\nreference to iloc.bh that must be released via brelse().\n\nHowever, several error paths jump to the 'out' label without\nreleasing iloc.bh:\n\n - ext4_handle_dirty_metadata() failure\n - sync_dirty_buffer() failure\n - ext4_mark_inode_used() failure\n - ext4_iget() failure\n\nFix this by introducing an 'out_brelse' label placed just before\nthe existing 'out' label to ensure iloc.bh is always released.\n\nAdditionally, make ext4_fc_replay_inode() propagate errors\nproperly instead of always returning 0.",
  "id": "CVE-2026-43066",
  "modified": "2026-07-15T01:49:11.739408007Z",
  "published": "2026-05-05T15:23:25.984Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0892f12cd49fde5d5db68137923db107f894f3a3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/19782b4c793b49a6aa4abbb307ddff3610009d21"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a63033696e60b5d70816f1d119645ac5b0b0a03"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9c90449a9ac2cd1ba540ad2561b8b70c1bfb0a25"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c426231e3d51916e83b6d1ab7ed8a65e83bca5b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ca99cbcc316cdfd2040cc2b13d1426ccb3b3b50b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ec0a7500d8eace5b4f305fa0c594dd148f0e8d29"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f7817ad399d604e8639005d87d148b5ec626ad26"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43066.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43066"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "ext4: fix iloc.bh leak in ext4_fc_replay_inode() error paths"
}