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
Configurations
Configuration 1 (hide)
|
History
27 Jan 2026, 18:57
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux
Linux linux Kernel |
|
| CWE | NVD-CWE-noinfo | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.5:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.5:rc7:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.5:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.5:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:* |
|
| References | () https://git.kernel.org/stable/c/2298f2589903a8bc03061b54b31fd97985ab6529 - Patch | |
| References | () https://git.kernel.org/stable/c/590a809ff743e7bd890ba5fb36bc38e20a36de53 - Patch | |
| References | () https://git.kernel.org/stable/c/dbafe636db415299e54d9dfefc1003bda9e71c9d - Patch | |
| References | () https://git.kernel.org/stable/c/ef5fea70e5915afd64182d155e72bfb4f275e1fc - Patch |
01 Oct 2025, 12:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-10-01 12:15
Updated : 2026-01-27 18:57
NVD link : CVE-2023-53526
Mitre link : CVE-2023-53526
CVE.ORG link : CVE-2023-53526
JSON object : View
Products Affected
linux
- linux_kernel
CWE