# CVE-2025-68315: f2fs: fix to detect potential corrupted nid in free_nid_list

CVE-2025-68315 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-68315, released December 16, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-68315
- Priority: High
- CVSS: 9.8 (Important)
- EPSS: 0.0043
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 16, 2025
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-68315

## Description

In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to detect potential corrupted nid in free_nid_list  As reported, on-disk footer.ino and footer.nid is the same and out-of-range, let's add sanity check on f2fs_alloc_nid() to detect any potential corruption in free_nid_list.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.176-1 | [DEBIAN-CVE-2025-68315](https://patchblox.com/security/data/fix/linux/debian-cve-2025-68315.md) | Dec 16, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.12.63-1 | [DEBIAN-CVE-2025-68315](https://patchblox.com/security/data/fix/linux/debian-cve-2025-68315.md) | Dec 16, 2025 |
| Linux | linux Debian 14 | 6.17.8-1 | [DEBIAN-CVE-2025-68315](https://patchblox.com/security/data/fix/linux/debian-cve-2025-68315.md) | Dec 16, 2025 |

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Data as of 2026-11-09T01:18:40Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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