Review reviewHigh

CVE-2025-40087

Linux

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.

CVSS: 7.5
EPSS: 0.47%
CISA KEV: Not listed
Published: 2025.10.30

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.47%

Technical severityCVSS 7.5

Vulnerability overview

Affected product and versions

Product: Linux
Affected versions: >= 9b9960a0ca4773e21c4b153ed355583946346b25 < a75994dd879401c3e24ff51c2536559f1a53ea27, >= 9b9960a0ca4773e21c4b153ed355583946346b25 < 34d187e020cbda112a6c6f094f0ca5e6a8672b75, >= 9b9960a0ca4773e21c4b153ed355583946346b25 < ba88a53d7f5df4191583abf214214efe0cda91d2, >= 9b9960a0ca4773e21c4b153ed355583946346b25 < da9129ef77786839a3ccd1d7afeeab790bceaa1d, >= 9b9960a0ca4773e21c4b153ed355583946346b25 < f7353208c91ab004e0179c5fb6c365b0f132f9f0, >= 9b9960a0ca4773e21c4b153ed355583946346b25 < a156af6a4dc38c2aa7c98e89520a70fb3b3e7df4, >= 9b9960a0ca4773e21c4b153ed355583946346b25 < 785ec512afa80d0540f2ca797c0e56de747a6083, >= 9b9960a0ca4773e21c4b153ed355583946346b25 < 4b47a8601b71ad98833b447d465592d847b4dc77, >= 4.8
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE: Not available