Linux kernel version from 2.6.17 to 18.104.22.168 all are affected because of vmsplice bug. The exploit code can be used to test if a kernel is vulnerable and it can start a root shell.
Update: See how to apply a patch to kernel source tree.
An updated autofs package that fixes a bug is now available under RHEL 4.x server and desktop systems.
Updated freetype packages that fix various security issues are now available for CentOS / Red Hat Enterprise Linux 3, 4, 5 and 2.1 server software.
Update brings broad refresh of hardware support and improved quality, combined with new features and enhancements in areas such as virtualization, desktop, networking, storage & clustering and security
CVE-2008-0553: libtk-img – buffer overflow via local / remote arbitrary code execution.
The smaba has a regression where under certain circumstances accessing large files might cause the client to report an invalid packet length error.
How do I lock out a user after a set number of login attempts in Linux but also automatically unlock it after N minutes?