# CVE-2025-38333: f2fs: fix to bail out in get_new_segment()

CVE-2025-38333 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-38333, released July 10, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-38333
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 10, 2025
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-38333

## Description

In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to bail out in get_new_segment()  ------------[ cut here ]------------ WARNING: CPU: 3 PID: 579 at fs/f2fs/segment.c:2832 new_curseg+0x5e8/0x6dc pc : new_curseg+0x5e8/0x6dc Call trace:  new_curseg+0x5e8/0x6dc  f2fs_allocate_data_block+0xa54/0xe28  do_write_page+0x6c/0x194  f2fs_do_write_node_page+0x38/0x78  __write_node_page+0x248/0x6d4  f2fs_sync_node_pages+0x524/0x72c  f2fs_write_checkpoint+0x4bc/0x9b0  __checkpoint_and_complete_reqs+0x80/0x244  issue_checkpoint_thread+0x8c/0xec  kthread+0x114/0x1bc  ret_from_fork+0x10/0x20  get_new_segment() detects inconsistent status in between free_segmap and free_secmap, let's record such error into super block, and bail out get_new_segment() instead of continue using the segment.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.35-1 | [DEBIAN-CVE-2025-38333](https://patchblox.com/security/data/fix/linux/debian-cve-2025-38333.md) | Jul 10, 2025 |
| Linux | linux Debian 14 | 6.12.35-1 | [DEBIAN-CVE-2025-38333](https://patchblox.com/security/data/fix/linux/debian-cve-2025-38333.md) | Jul 10, 2025 |

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