Red Hat: RHSA-2010:0147-01 Important: Kernel Security and Bug Fix

The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security fixes:
* a NULL pointer dereference flaw was found in the sctp_rcv_ootb() function in the Linux kernel Stream Control Transmission Protocol (SCTP) implementation. A remote attacker could send a specially-crafted SCTP packet to a target system, resulting in a denial of service. (CVE-2010-0008, Important)
* a missing boundary check was found in the do_move_pages() function in the memory migration functionality in the Linux kernel. A local user could use this flaw to cause a local denial of service or an information leak. (CVE-2010-0415, Important)
* a NULL pointer dereference flaw was found in the ip6_dst_lookup_tail() function in the Linux kernel. An attacker on the local network could trigger this flaw by sending IPv6 traffic to a target system, leading to a system crash (kernel OOPS) if dst->neighbour is NULL on the target system when receiving an IPv6 packet. (CVE-2010-0437, Important)
* a NULL pointer dereference flaw was found in the ext4 file system code in the Linux kernel. A local attacker could use this flaw to trigger a local denial of service by mounting a specially-crafted, journal-less ext4 file system, if that file system forced an EROFS error. (CVE-2009-4308, Moderate)
* an information leak was found in the print_fatal_signal() implementation in the Linux kernel. When "/proc/sys/kernel/print-fatal-signals" is set to 1 (the default value is 0), memory that is reachable by the kernel could be leaked to user-space. This issue could also result in a system crash. Note that this flaw only affected the i386 architecture. (CVE-2010-0003, Moderate)
* missing capability checks were found in the ebtables implementation, used for creating an Ethernet bridge firewall. This could allow a local, unprivileged user to bypass intended capability restrictions and modify ebtables rules. (CVE-2010-0007, Low)
Bug fixes:
* a bug prevented Wake on LAN (WoL) being enabled on certain Intel hardware. (BZ#543449)
* a race issue in the Journaling Block Device. (BZ#553132)
* programs compiled on x86, and that also call sched_rr_get_interval(), were silently corrupted when run on 64-bit systems. (BZ#557684)
* the RHSA-2010:0019 update introduced a regression, preventing WoL from working for network devices using the e1000e driver. (BZ#559335)
* adding a bonding interface in mode balance-alb to a bridge was not functional. (BZ#560588)
* some KVM (Kernel-based Virtual Machine) guests experienced slow performance (and possibly a crash) after suspend/resume. (BZ#560640)
* on some systems, VF cannot be enabled in dom0. (BZ#560665)
* on systems with certain network cards, a system crash occurred after enabling GRO. (BZ#561417)
* for x86 KVM guests with pvclock enabled, the boot clocks were registered twice, possibly causing KVM to write data to a random memory area during the guest's life. (BZ#561454)
* serious performance degradation for 32-bit applications, that map (mmap) thousands of small files, when run on a 64-bit system. (BZ#562746)
* improved kexec/kdump handling. Previously, on some systems under heavy load, kexec/kdump was not functional. (BZ#562772)
* dom0 was unable to boot when using the Xen hypervisor on a system with a large number of logical CPUs. (BZ#562777)
* a fix for a bug that could potentially cause file system corruption. (BZ#564281)
* a bug caused infrequent cluster issues for users of GFS2. (BZ#564288)
* gfs2_delete_inode failed on read-only file systems. (BZ#564290)
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.