| Description: | The kernel packages contain the Linux kernel, the core of any Linuxoperating system.* It was found that the permission checks performed by the Linux kernelwhen a netlink message was received were not sufficient. A local,unprivileged user could potentially bypass these restrictions by passing anetlink socket as stdout or stderr to a more privileged process andaltering the output of this process. (CVE-2014-0181, Moderate)Red Hat would like to thank Andy Lutomirski for reporting this issue.This update also fixes the following bugs:* Previously, the kernel did not successfully deliver multicast packetswhen the multicast querier was disabled. Consequently, the corosync utilityterminated unexpectedly and the affected storage node did not join itsintended cluster. With this update, multicast packets are deliveredproperly when the multicast querier is disabled, and corosync handles thenode as expected. (BZ#902454)* Previously, the kernel wrote the metadata contained in all systeminformation blocks on a single page of the /proc/sysinfo file. However,when the machine configuration was very extensive and the data did not fiton a single page, the system overwrote random memory regions, which in turncaused data corruption when reading the /proc/sysconf file. With thisupdate, /proc/sysinfo automatically allocates a larger buffer if the dataoutput does not fit the current buffer, which prevents the data corruption.(BZ#1131283)* Prior to this update, the it_real_fn() function did not, in certaincases, successfully acquire the SIGLOCK signal when the do_setitimer()function used the ITIMER_REAL timer. As a consequence, the current processentered an endless loop and became unresponsive. This update fixes the bugand it_real_fn() no longer causes the kernel to become unresponsive.(BZ#1134654)All kernel users are advised to upgrade to these updated packages, whichcontain backported patches to correct these issues. The system must berebooted for this update to take effect. |