# CVE-2026-68459: linux: In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix potential deadlock in gc_merge path of...

CVE-2026-68459 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-68459, released August 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-68459
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 15, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix potential deadlock in gc_merge path of f2fs_balance_fs()  When we mount device w/ gc_merge mount option, we may suffer below potential deadlock:  Kworker					GC trehad			Truncator - f2fs_write_cache_pages  - f2fs_write_single_data_page   - f2fs_do_write_data_page    - folio_start_writeback  --- set writeback flag on folio    - f2fs_outplace_write_data    : cached folio in internal bio cache   - f2fs_balance_fs    - wake_up(gc_thread)    : wake up gc thread to run foreground GC    - finish_wait(fggc_wq)    : wait on the waitqueue --- wait on GC thread to finish the work 									- truncate_inode_pages_range 									 - __filemap_get_folio(, FGP_LOCK)  --- lock folio 									 - truncate_inode_partial_folio 									  - folio_wait_writeback            --- wait on writeback being cleared 					- do_garbage_collect 					 - move_data_page 					  - f2fs_get_lock_data_folio 					   - lock on folio  --- blocked on folio's lock  In order to avoid such deadlock, let's call below functions to commit cached bios in GC_MERGE path of f2fs_balance_fs() as the same as we did in NOGC_MERGE path. - f2fs_submit_merged_write(sbi, DATA); - f2fs_submit_all_merged_ipu_writes(sbi);

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.180-1 | [DEBIAN-CVE-2026-68459](https://patchblox.com/security/data/fix/linux/debian-cve-2026-68459.md) | Aug 15, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.96-1 | [DEBIAN-CVE-2026-68459](https://patchblox.com/security/data/fix/linux/debian-cve-2026-68459.md) | Aug 15, 2026 |
| Linux | linux Debian 14 | 7.1.5-1 | [DEBIAN-CVE-2026-68459](https://patchblox.com/security/data/fix/linux/debian-cve-2026-68459.md) | Aug 15, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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