CVE-2026-43066 (GCVE-0-2026-43066)
Vulnerability from cvelistv5
Published
2026-05-05 15:23
Modified
2026-05-11 22:17
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: fix iloc.bh leak in ext4_fc_replay_inode() error paths During code review, Joseph found that ext4_fc_replay_inode() calls ext4_get_fc_inode_loc() to get the inode location, which holds a reference to iloc.bh that must be released via brelse(). However, several error paths jump to the 'out' label without releasing iloc.bh: - ext4_handle_dirty_metadata() failure - sync_dirty_buffer() failure - ext4_mark_inode_used() failure - ext4_iget() failure Fix this by introducing an 'out_brelse' label placed just before the existing 'out' label to ensure iloc.bh is always released. Additionally, make ext4_fc_replay_inode() propagate errors properly instead of always returning 0.
References
Impacted products
Vendor Product Version
Linux Linux Version: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2
Version: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2
Version: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2
Version: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2
Version: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2
Version: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2
Version: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2
Version: 8016e29f4362e285f0f7e38fadc61a5b7bdfdfa2
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      "descriptions": [
        {
          "lang": "en",
          "value": "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 \u0027out\u0027 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 \u0027out_brelse\u0027 label placed just before\nthe existing \u0027out\u0027 label to ensure iloc.bh is always released.\n\nAdditionally, make ext4_fc_replay_inode() propagate errors\nproperly instead of always returning 0."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:17:03.438Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/0892f12cd49fde5d5db68137923db107f894f3a3"
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          "url": "https://git.kernel.org/stable/c/5a63033696e60b5d70816f1d119645ac5b0b0a03"
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          "url": "https://git.kernel.org/stable/c/ca99cbcc316cdfd2040cc2b13d1426ccb3b3b50b"
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        {
          "url": "https://git.kernel.org/stable/c/ec0a7500d8eace5b4f305fa0c594dd148f0e8d29"
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      "title": "ext4: fix iloc.bh leak in ext4_fc_replay_inode() error paths",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43066",
    "datePublished": "2026-05-05T15:23:25.984Z",
    "dateReserved": "2026-05-01T14:12:55.981Z",
    "dateUpdated": "2026-05-11T22:17:03.438Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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