RedHat Security Advisory RHSA-2009:1670

The remote host is missing updates announced in advisory RHSA-2009:1670. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security fixes: * NULL pointer dereference flaws in the r128 driver. Checks to test if the Concurrent Command Engine state was initialized were missing in private IOCTL functions. An attacker could use these flaws to cause a local denial of service or escalate their privileges. (CVE-2009-3620, Important) * a NULL pointer dereference flaw in the NFSv4 implementation. Several 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) * a flaw in tcf_fill_node(). A certain data structure in this function was not initialized properly before being copied to user-space. This could lead to an information leak. (CVE-2009-3612, Moderate) * unix_stream_connect() did not check if a UNIX domain socket was in the shutdown state. This could lead to a deadlock. A local, unprivileged user could use this flaw to cause a denial of service. (CVE-2009-3621, Moderate) Knowledgebase DOC-20536 has steps to mitigate NULL pointer dereference flaws. Users should upgrade to these updated packages, which contain backported patches to correct these issues. 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