The SUSE Linux Enterprise 11 SP4 kernel was updated to receive various security and bugfixes. For the PowerPC64 a new 'bigmem' flavor has been added to support big Power machines. (FATE#319026) The following security bugs were fixed :

  - CVE-2016-7042: The proc_keys_show function in     security/keys/proc.c in the Linux kernel, when the GNU     Compiler Collection (gcc) stack protector is enabled,     uses an incorrect buffer size for certain timeout data,     which allowed local users to cause a denial of service     (stack memory corruption and panic) by reading the     /proc/keys file (bnc#1004517).

  - CVE-2016-7097: The filesystem implementation in the     Linux kernel preserves the setgid bit during a setxattr     call, which allowed local users to gain group privileges     by leveraging the existence of a setgid program with     restrictions on execute permissions (bnc#995968).

  - CVE-2015-8956: The rfcomm_sock_bind function in     net/bluetooth/rfcomm/sock.c in the Linux kernel allowed     local users to obtain sensitive information or cause a     denial of service (NULL pointer dereference) via vectors     involving a bind system call on a Bluetooth RFCOMM     socket (bnc#1003925).

  - CVE-2016-7117: Use-after-free vulnerability in the
    __sys_recvmmsg function in net/socket.c in the Linux     kernel allowed remote attackers to execute arbitrary     code via vectors involving a recvmmsg system call that     is mishandled during error processing (bnc#1003077).

  - CVE-2016-0823: The pagemap_open function in     fs/proc/task_mmu.c in the Linux kernel allowed local     users to obtain sensitive physical-address information     by reading a pagemap file, aka Android internal bug     25739721 (bnc#994759).

  - CVE-2016-7425: The arcmsr_iop_message_xfer function in     drivers/scsi/arcmsr/arcmsr_hba.c in the Linux kernel did     not restrict a certain length field, which allowed local     users to gain privileges or cause a denial of service     (heap-based buffer overflow) via an     ARCMSR_MESSAGE_WRITE_WQBUFFER control code (bnc#999932).

  - CVE-2016-3841: The IPv6 stack in the Linux kernel     mishandled options data, which allowed local users to     gain privileges or cause a denial of service     (use-after-free and system crash) via a crafted sendmsg     system call (bnc#992566).

  - CVE-2016-6828: The tcp_check_send_head function in     include/net/tcp.h in the Linux kernel did not properly     maintain certain SACK state after a failed data copy,     which allowed local users to cause a denial of service     (tcp_xmit_retransmit_queue use-after-free and system     crash) via a crafted SACK option (bnc#994296).

  - CVE-2016-5696: net/ipv4/tcp_input.c in the Linux kernel     did not properly determine the rate of challenge ACK     segments, which made it easier for remote attackers to     hijack TCP sessions via a blind in-window attack     (bnc#989152).

  - CVE-2016-6480: Race condition in the ioctl_send_fib     function in drivers/scsi/aacraid/commctrl.c in the Linux     kernel allowed local users to cause a denial of service     (out-of-bounds access or system crash) by changing a     certain size value, aka a 'double fetch' vulnerability     (bnc#991608).

  - CVE-2016-4998: The IPT_SO_SET_REPLACE setsockopt     implementation in the netfilter subsystem in the Linux     kernel allowed local users to cause a denial of service     (out-of-bounds read) or possibly obtain sensitive     information from kernel heap memory by leveraging     in-container root access to provide a crafted offset     value that leads to crossing a ruleset blob boundary     (bnc#986365).

  - CVE-2015-7513: arch/x86/kvm/x86.c in the Linux kernel     did not reset the PIT counter values during state     restoration, which allowed guest OS users to cause a     denial of service (divide-by-zero error and host OS     crash) via a zero value, related to the     kvm_vm_ioctl_set_pit and kvm_vm_ioctl_set_pit2 functions     (bnc#960689).

  - CVE-2013-4312: The Linux kernel allowed local users to     bypass file-descriptor limits and cause a denial of     service (memory consumption) by sending each descriptor     over a UNIX socket before closing it, related to     net/unix/af_unix.c and net/unix/garbage.c (bnc#839104     bsc#922947 bsc#968014).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

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SUSE SLES11 Security Update : kernel (SUSE-SU-2016:2976-1)

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