{"id":"CVE-2023-53526","revision":"359abc98ff9547d3be864ae3eb15acff","records":[{"revision":"359abc98ff9547d3be864ae3eb15acff","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2023-53526","aliases":[],"title":"jbd2: check 'jh->b_transaction' before removing it from checkpoint","description":"In the Linux kernel, the following vulnerability has been resolved:\n\njbd2: check 'jh->b_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->t_checkpoint_list\n journal->j_checkpoint_transactions = commit_transaction\n // Put trans1 into journal->j_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->t_checkpoint_list\n\nStep 4:\njbd2_log_do_checkpoint\n trans1 = journal->j_checkpoint_transactions\n // jh is not in trans1->t_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->b_transaction' before remove it from checkpoint.","state":0,"publishedAt":"2025-10-01T11:46:11.862+00:00","modifiedAt":"2026-10-15T21:41:30.04+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/jbd2/checkpoint.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"b832174b7f89df3ebab02f5b485d00127a0e1a6e\",\n                            \"lessThan\": \"ef5fea70e5915afd64182d155e72bfb4f275e1fc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e5c768d809a85e9efd0274b2efe69d4970cc0014\",\n                            \"lessThan\": \"dbafe636db415299e54d9dfefc1003bda9e71c9d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"46f881b5b1758dc4a35fba4a643c10717d0cf427\",\n                            \"lessThan\": \"2298f2589903a8bc03061b54b31fd97985ab6529\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"46f881b5b1758dc4a35fba4a643c10717d0cf427\",\n                            \"lessThan\": \"590a809ff743e7bd890ba5fb36bc38e20a36de53\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"019b59aeb2af6b47d5c8e69c5dc1d731c8df0354\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5.15.129\",\n                            \"lessThan\": \"5.15.132\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.50\",\n                            \"lessThan\": \"6.1.54\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.4.13\",\n                            \"lessThan\": \"6.5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/jbd2/checkpoint.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.5\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.5\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.132\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.54\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.5.4\",\n                            \"lessThanOrEqual\": \"6.5.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/ef5fea70e5915afd64182d155e72bfb4f275e1fc","https://git.kernel.org/stable/c/dbafe636db415299e54d9dfefc1003bda9e71c9d","https://git.kernel.org/stable/c/2298f2589903a8bc03061b54b31fd97985ab6529","https://git.kernel.org/stable/c/590a809ff743e7bd890ba5fb36bc38e20a36de53"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53526","license":"CVE Program Terms of Use","key":"cve-program:CVE-2023-53526","identifiers":["CVE-2023-53526"]},"retained":false,"historicalAffected":[]}],"coverage":[]}