CVE-2023-53526 Affecting dlm-kmp-default package, versions <6.4.0-150600.23.73.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-SLES156-DLMKMPDEFAULT-13579683
- published16 Oct 2025
- disclosed15 Oct 2025
Introduced: 15 Oct 2025
NewCVE-2023-53526 (opens in a new tab)How to fix?
Upgrade SLES:15.6 dlm-kmp-default to version 6.4.0-150600.23.73.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream dlm-kmp-default package and not the dlm-kmp-default package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
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.
References
- https://www.suse.com/security/cve/CVE-2023-53526.html
- https://bugzilla.suse.com/1250928
- 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