| Description: | The kernel packages contain the Linux kernel, the core of any Linuxoperating system.* A race condition flaw was found in the way the Linux kernel's KVMsubsystem handled PIT (Programmable Interval Timer) emulation. A guest userwho has access to the PIT I/O ports could use this flaw to crash the host.(CVE-2014-3611, Important)* A memory corruption flaw was found in the way the USB ConnectTechWhiteHEAT serial driver processed completion commands sent via USB RequestBlocks buffers. An attacker with physical access to the system could usethis flaw to crash the system or, potentially, escalate their privileges onthe system. (CVE-2014-3185, Moderate)* It was found that the Linux kernel's KVM subsystem did not handle the VMexits gracefully for the invept (Invalidate Translations Derived from EPT)and invvpid (Invalidate Translations Based on VPID) instructions. On hostswith an Intel processor and invept/invppid VM exit support, an unprivilegedguest user could use these instructions to crash the guest. (CVE-2014-3645,CVE-2014-3646, Moderate)Red Hat would like to thank Lars Bull of Google for reportingCVE-2014-3611, and the Advanced Threat Research team at Intel Security forreporting CVE-2014-3645 and CVE-2014-3646.This update also fixes the following bugs:* This update fixes several race conditions between PCI error recoverycallbacks and potential calls of the ifup and ifdown commands in the tg3driver. When triggered, these race conditions could cause a kernel crash.(BZ#1142570)* Previously, GFS2 failed to unmount a sub-mounted GFS2 file system if itsparent was also a GFS2 file system. This problem has been fixed by addingthe appropriate d_op->d_hash() routine call for the last component of themount point path in the path name lookup mechanism code (namei).(BZ#1145193)* Due to previous changes in the virtio-net driver, a Red Hat EnterpriseLinux 6.6 guest was unable to boot with the "mgr_rxbuf=off" optionspecified. This was caused by providing the page_to_skb() function with anincorrect packet length in the driver's Rx path. This problem has beenfixed and the guest in the described scenario can now boot successfully.(BZ#1148693)* When using one of the newer IPSec Authentication Header (AH) algorithmswith Openswan, a kernel panic could occur. This happened because themaximum truncated ICV length was too small. To fix this problem, theMAX_AH_AUTH_LEN parameter has been set to 64. (BZ#1149083)* A bug in the IPMI driver caused the kernel to panic when an IPMIinterface was removed using the hotmod script. The IPMI driver has beenfixed to properly clean the relevant data when removing an IPMI interface.(BZ#1149578)* Due to a bug in the IPMI driver, the kernel could panic when adding anIPMI interface that was previously removed using the hotmod script.This update fixes this bug by ensuring that the relevant shadow structureis initialized at the right time. (BZ#1149580)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. |