CVE-2026-90103 Linux Kernel NFSv4.2 - Denial of Service

Linux kernel NFSv4.2 contains a buffer exhaustion vulnerability caused by insufficient send buffer size in LAYOUTSTATS encoding, letting malicious NFS servers cause denial of service by exhausting buffer and locking resources, exploit requires malicious NFS server.

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

Details

Type
Denial of Service
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 a Linux kernel version with PNFS_LAYOUTSTATS_MAXSIZE raised to 384 or later.

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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