# CVE-2023-54068: linux: In the Linux kernel, the following vulnerability has been resolved:  f2fs: compress: fix to call f2fs_wait_on_page_wr...

CVE-2023-54068 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-54068, released December 24, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-54068
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 24, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  f2fs: compress: fix to call f2fs_wait_on_page_writeback() in f2fs_write_raw_pages()  BUG_ON() will be triggered when writing files concurrently, because the same page is writtenback multiple times.  1597 void folio_end_writeback(struct folio *folio) 1598 { 		...... 1618     if (!__folio_end_writeback(folio)) 1619         BUG(); 		...... 1625 }  kernel BUG at mm/filemap.c:1619! Call Trace:  <TASK>  f2fs_write_end_io+0x1a0/0x370  blk_update_request+0x6c/0x410  blk_mq_end_request+0x15/0x130  blk_complete_reqs+0x3c/0x50  __do_softirq+0xb8/0x29b  ? sort_range+0x20/0x20  run_ksoftirqd+0x19/0x20  smpboot_thread_fn+0x10b/0x1d0  kthread+0xde/0x110  ? kthread_complete_and_exit+0x20/0x20  ret_from_fork+0x22/0x30  </TASK>  Below is the concurrency scenario:  [Process A]		[Process B]		[Process C] f2fs_write_raw_pages()   - redirty_page_for_writepage()   - unlock page() 			f2fs_do_write_data_page() 			  - lock_page() 			  - clear_page_dirty_for_io() 			  - set_page_writeback() [1st writeback] 			    ..... 			    - unlock page()  						generic_perform_write() 						  - f2fs_write_begin() 						    - wait_for_stable_page()  						  - f2fs_write_end() 						    - set_page_dirty()    - lock_page()     - f2fs_do_write_data_page()       - set_page_writeback() [2st writeback]  This problem was introduced by the previous commit 7377e853967b ("f2fs: compress: fix potential deadlock of compress file"). All pagelocks were released in f2fs_write_raw_pages(), but whether the page was in the writeback state was ignored in the subsequent writing process. Let's fix it by waiting for the page to writeback before writing.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.37-1 | [DEBIAN-CVE-2023-54068](https://patchblox.com/security/data/fix/linux/debian-cve-2023-54068.md) | Dec 24, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.3.7-1 | [DEBIAN-CVE-2023-54068](https://patchblox.com/security/data/fix/linux/debian-cve-2023-54068.md) | Dec 24, 2025 |
| Linux | linux Debian 14 | 6.3.7-1 | [DEBIAN-CVE-2023-54068](https://patchblox.com/security/data/fix/linux/debian-cve-2023-54068.md) | Dec 24, 2025 |

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