jbd2: check 'jh->b_transaction' before removing it from checkpoint

{
  "id": "6ca3dc732c9d153c06472d96adb7911333b601e5ff025e5ad86b1c6bc6d7023a",
  "url": "https://osv.dev/vulnerability/CVE-2023-53526",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "jbd2: check 'jh->b_transaction' before removing it from checkpoint",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: jbd2: check 'jh->b_transaction' before removing it from checkpoint Following process will corrupt ext4 image: Step 1: jbd2_journal_commit_transaction __jbd2_journal_insert_checkpoint(jh, commit_transaction) // Put jh into trans1->t_checkpoint_list journal->j_checkpoint_transactions = commit_transaction // Put trans1 into journal->j_checkpoint_transactions Step 2: do_get_write_access test_clear_buffer_dirty(bh) // clear buffer dirty，set jbd dirty __jbd2_journal_file_buffer(jh, transaction) // jh belongs to trans2 Step 3: drop_cache journal_shrink_one_cp_list jbd2_journal_try_remove_checkpoint if (!trylock_buffer(bh)) // lock bh, true if (buffer_dirty(bh)) // buffer is not dirty __jbd2_journal_remove_checkpoint(jh) // remove jh from trans1->t_checkpoint_list Step 4: jbd2_log_do_checkpoint trans1 = journal->j_checkpoint_transactions // jh is not in trans1->t_checkpoint_list jbd2_cleanup_journal_tail(journal) // trans1 is done Step 5: Power cut, trans2 is not committed, jh is lost in next mounting. Fix it by checking 'jh->b_transaction' before remove it from checkpoint.",
    "evidence": "osv:CVE-2023-53526",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.132",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.54",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.5.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-53526",
      "aliases": [
        "CVE-2023-53526"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
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            "v5.15.129",
            "v6.1.53",
            "v6.1.52",
            "v6.1.51",
            "v6.1.50",
            "v6.4.16",
            "v6.4.15",
            "v6.4.14",
            "v6.4.13"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53526.json"
          }
        },
        {
          "ranges": [
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              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "0"
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53526.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.739634640Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2298f2589903a8bc03061b54b31fd97985ab6529",
        "https://git.kernel.org/stable/c/590a809ff743e7bd890ba5fb36bc38e20a36de53",
        "https://git.kernel.org/stable/c/dbafe636db415299e54d9dfefc1003bda9e71c9d",
        "https://git.kernel.org/stable/c/ef5fea70e5915afd64182d155e72bfb4f275e1fc",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53526.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-53526",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53526.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-53526",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496475,
  "published_at": "2025-10-01T11:46:11.862+00:00"
}