CVE:CVE-2011-2491
CNNVD:CNNVD-201108-270
Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。NFSv4 implementation是其中的一个分布式文件系统协议。
Linux kernel 3.0之前的版本中NFS客户端功能中的Network Lock Manager (NLM)协议实现中存在漏洞。通过LOCK_UN flock系统调用，本地攻击者利用该漏洞导致拒绝服务（系统挂起）。
solution:Upgrade linux linux_kernel to a higher version than 3.0,and avoid the version (,3.0); Upgrade redhat enterprise_linux_desktop to a higher version than 5.0,and avoid the version 5.0; Upgrade redhat enterprise_linux_server to a higher version than 5.0,and avoid the version 5.0; Upgrade redhat enterprise_linux_workstation to a higher version than 5.0,and avoid the version 5.0