RedHat Security Advisory RHSA-2009:1635

The remote host is missing updates announced in advisory RHSA-2009:1635. The kernel-rt packages contain the Linux kernel, the core of any Linux operating system. These updated packages fix the following security issues: * a NULL pointer dereference flaw was found in the NFSv4 implementation in the Linux kernel. Several of the NFSv4 file locking functions failed to check whether a file had been opened on the server before performing locking operations on it. A local user on a system with an NFSv4 share mounted could possibly use this flaw to cause a denial of service or escalate their privileges. (CVE-2009-3726, Important) * permission issues were found in the megaraid_sas driver (for SAS based RAID controllers) in the Linux kernel. The dbg_lvl and poll_mode_io files on the sysfs file system (/sys/) had world-writable permissions. This could allow local, unprivileged users to change the behavior of the driver. (CVE-2009-3889, CVE-2009-3939, Moderate) Users should upgrade to these updated packages, which contain backported patches to correct these issues and add these enhancements. The system must be rebooted for this update to take effect.
Please note that this update is available via Red Hat Network. To use Red Hat Network, launch the Red Hat Update Agent with the following command: up2date