CVE-2009-3726: Linux Kernel

High severity, CVSS 7.8. EPSS: 12% chance of exploitation in the next 30 days.

The nfs4_proc_lock function in fs/nfs/nfs4proc.c in the NFSv4 client in the Linux kernel before 2.6.31-rc4 allows remote NFS servers to cause a denial of service (NULL pointer dereference and panic) by sending a certain response containing incorrect file attributes, which trigger attempted use of an open file that lacks NFSv4 state.

Affected products

• Linux Linux Kernel: up to and including 2.6.31; version 2.2.27 only; version 2.4.1 only; version 2.4.2 only; version 2.4.3 only; version 2.4.4 only; …

Published 2009-11-09. Last modified 2026-06-16.