{"id":"CVE-2023-53526","summary":"jbd2: check 'jh-\u003eb_transaction' before removing it from checkpoint","details":"In the Linux kernel, the following vulnerability has been resolved:\n\njbd2: check 'jh-\u003eb_transaction' before removing it from checkpoint\n\nFollowing process will corrupt ext4 image:\nStep 1:\njbd2_journal_commit_transaction\n __jbd2_journal_insert_checkpoint(jh, commit_transaction)\n // Put jh into trans1-\u003et_checkpoint_list\n journal-\u003ej_checkpoint_transactions = commit_transaction\n // Put trans1 into journal-\u003ej_checkpoint_transactions\n\nStep 2:\ndo_get_write_access\n test_clear_buffer_dirty(bh) // clear buffer dirty，set jbd dirty\n __jbd2_journal_file_buffer(jh, transaction) // jh belongs to trans2\n\nStep 3:\ndrop_cache\n journal_shrink_one_cp_list\n  jbd2_journal_try_remove_checkpoint\n   if (!trylock_buffer(bh))  // lock bh, true\n   if (buffer_dirty(bh))     // buffer is not dirty\n   __jbd2_journal_remove_checkpoint(jh)\n   // remove jh from trans1-\u003et_checkpoint_list\n\nStep 4:\njbd2_log_do_checkpoint\n trans1 = journal-\u003ej_checkpoint_transactions\n // jh is not in trans1-\u003et_checkpoint_list\n jbd2_cleanup_journal_tail(journal)  // trans1 is done\n\nStep 5: Power cut, trans2 is not committed, jh is lost in next mounting.\n\nFix it by checking 'jh-\u003eb_transaction' before remove it from checkpoint.","modified":"2026-03-20T12:33:13.298494Z","published":"2025-10-01T11:46:11.862Z","related":["SUSE-SU-2025:03600-1","SUSE-SU-2025:03614-1","SUSE-SU-2025:03615-1","SUSE-SU-2025:03628-1","SUSE-SU-2025:03634-1","SUSE-SU-2025:20851-1","SUSE-SU-2025:20861-1","SUSE-SU-2025:20870-1","SUSE-SU-2025:20898-1","SUSE-SU-2025:3716-1","SUSE-SU-2025:3751-1","SUSE-SU-2025:3761-1","SUSE-SU-2025:4057-1","SUSE-SU-2025:4132-1","SUSE-SU-2025:4141-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53526.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2298f2589903a8bc03061b54b31fd97985ab6529"},{"type":"WEB","url":"https://git.kernel.org/stable/c/590a809ff743e7bd890ba5fb36bc38e20a36de53"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dbafe636db415299e54d9dfefc1003bda9e71c9d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ef5fea70e5915afd64182d155e72bfb4f275e1fc"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53526.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53526"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b832174b7f89df3ebab02f5b485d00127a0e1a6e"},{"fixed":"ef5fea70e5915afd64182d155e72bfb4f275e1fc"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"e5c768d809a85e9efd0274b2efe69d4970cc0014"},{"fixed":"dbafe636db415299e54d9dfefc1003bda9e71c9d"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"46f881b5b1758dc4a35fba4a643c10717d0cf427"},{"fixed":"2298f2589903a8bc03061b54b31fd97985ab6529"},{"fixed":"590a809ff743e7bd890ba5fb36bc38e20a36de53"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"019b59aeb2af6b47d5c8e69c5dc1d731c8df0354"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-53526.json"}}],"schema_version":"1.7.5"}