CVE-2023-53526

MEDIUM EPSS 3.3%
Published Oct 1, 20259mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Oct 1, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago

Description

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 Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
3.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel*≥5.15.129  –  <5.15.132
linuxlinux_kernel*≥6.1.50  –  <6.1.54
linuxlinux_kernel*≥6.4.13  –  <6.5
linuxlinux_kernel*≥6.5.1  –  <6.5.4
linuxlinux_kernel6.5any
linuxlinux_kernel6.5any
linuxlinux_kernel6.5any
linuxlinux_kernel6.5any
linuxlinux_kernel6.5any
linuxlinux_kernel6.5any

References 4

  • git.kernel.org https://git.kernel.org/stable/c/2298f2589903a8bc03061b54b31fd97985ab6529
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/590a809ff743e7bd890ba5fb36bc38e20a36de53
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dbafe636db415299e54d9dfefc1003bda9e71c9d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ef5fea70e5915afd64182d155e72bfb4f275e1fc
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/2298f2589903a8bc03061b54b31fd97985ab6529
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/590a809ff743e7bd890ba5fb36bc38e20a36de53
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dbafe636db415299e54d9dfefc1003bda9e71c9d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ef5fea70e5915afd64182d155e72bfb4f275e1fc
    Patch