jbd2: check 'jh->b_transaction' before removing it from checkpoint
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.15.129 to before 5.15.132; 6.1.50 to before 6.1.54; 6.4.13 to before 6.5 | 5.15.132, 6.1.54, 6.5 | Patch available | CNA |
| Linux | Linux | 6.5 and later | 5.15.132, 6.1.54, 6.5.4, 6.6 | Patch available | CNA |
- Linux VendorLinux Affected 5.15.129 to before 5.15.132; 6.1.50 to before 6.1.54; 6.4.13 to before 6.5 Fixed in 5.15.132, 6.1.54, 6.5 Patch available CNA
- Linux VendorLinux Affected 6.5 and later Fixed in 5.15.132, 6.1.54, 6.5.4, 6.6 Patch available CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.15.129 to before 5.15.132; 6.1.50 to before 6.1.54; 6.4.13 to before 6.5; 6.5.1 to before 6.5.4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:-:*:*:*:*:*:* | 6.5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:* | 6.5 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:* | 6.5 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:rc5:*:*:*:*:*:* | 6.5 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:rc6:*:*:*:*:*:* | 6.5 rc6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:rc7:*:*:*:*:*:* | 6.5 rc7 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.15.129 to before 5.15.132; 6.1.50 to before 6.1.54; 6.4.13 to before 6.5; 6.5.1 to before 6.5.4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:-:*:*:*:*:*:* Versions 6.5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:* Versions 6.5 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:* Versions 6.5 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:rc5:*:*:*:*:*:* Versions 6.5 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:rc6:*:*:*:*:*:* Versions 6.5 rc6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:rc7:*:*:*:*:*:* Versions 6.5 rc7 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.15.132, 6.1.54, 6.5
- Fix · CNA Linux (Linux) Fixed in 5.15.132, 6.1.54, 6.5.4, 6.6
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 3 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2023-53526
- 2026-10-03 Alias added: GHSA-rhfj-r57g-8474
- 2026-10-16 CISA SSVC decision points changed
References
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2023-53526 · CVE Program
- CVE-2023-53526 · NVD
- FIRST EPSS
- GHSA-rhfj-r57g-8474 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-53526 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences