CVE-2023-53526jbd2: check 'jh->b_transaction' before removing it from checkpoint
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from b832174b7f89df3ebab02f5b485d00127a0e1a6e before ef5fea70e5915afd64182d155e72bfb4f275e1fc; from e5c768d809a85e9efd0274b2efe69d4970cc0014 before dbafe636db415299e54d9dfefc1003bda9e71c9d; from 46f881b5b1758dc4a35fba4a643c10717d0cf427 before 2298f2589903a8bc03061b54b31fd97985ab6529; from 46f881b5b1758dc4a35fba4a643c10717d0cf427 before 590a809ff743e7bd890ba5fb36bc38e20a36de53; 019b59aeb2af6b47d5c8e69c5dc1d731c8df0354; from 5.15.129 before 5.15.132; from 6.1.50 before 6.1.54; from 6.4.13 before 6.5 | CNA record |
linux linux_kernel linux:linux_kernel | from 5.15.129 before 5.15.132; from 6.1.50 before 6.1.54; from 6.4.13 before 6.5; from 6.5.1 before 6.5.4; 6.5; 6.5; 6.5; 6.5; and 2 more ranges | NVD |
References
- https://git.kernel.org/stable/c/ef5fea70e5915afd64182d155e72bfb4f275e1fcpatch
- https://git.kernel.org/stable/c/dbafe636db415299e54d9dfefc1003bda9e71c9dpatch
- https://git.kernel.org/stable/c/2298f2589903a8bc03061b54b31fd97985ab6529patch
- https://git.kernel.org/stable/c/590a809ff743e7bd890ba5fb36bc38e20a36de53patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.