CVE-2026-90102 Linux Kernel - Broken Access Control

Linux kernel contains a broken access control vulnerability in NFSv4/pnfs due to improper caching of data server versions, letting attackers cause null pointer dereference and connection issues, exploit requires use of flexfiles with mixed NFS versions on same address.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.70% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for NFSv4/pnfs version keying.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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