What’s Vulnerable › Vulnerabilities

CVE-2025-40087: NFSD: Define a proc_layoutcommit for the FlexFiles layout type

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-30 · updated 2026-10-19

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.

Affected products

• Linux kernel: 4.8 — fixed in 6.18

How to fix

Upgrade to a fixed version: Linux kernel 6.18. Check the vendor advisory for mitigations.

References

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

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