CVE-2011-2491: Linux Kernel

Medium severity, CVSS 4.9. EPSS: 0.4% chance of exploitation in the next 30 days.

The Network Lock Manager (NLM) protocol implementation in the NFS client functionality in the Linux kernel before 3.0 allows local users to cause a denial of service (system hang) via a LOCK_UN flock system call.

Affected products

• Linux Linux Kernel: before 3.0 (fixed in 3.0)
• Red Hat Enterprise Linux Desktop: version 5.0 only
• Red Hat Enterprise Linux Server: version 5.0 only
• Red Hat Enterprise Linux Workstation: version 5.0 only

Published 2013-03-01. Last modified 2026-06-16.