This update for xen fixes several issues. These security issues were fixed: - CVE-2017-12135: Unbounded recursion in grant table code allowed a malicious guest to crash the host or potentially escalate privileges/leak information . - CVE-2017-12137: Incorrectly-aligned updates to pagetables allowed for privilege escalation . - CVE-2017-11334: The address_space_write_continue function in exec.c allowed local guest OS privileged users to cause a denial of service by leveraging use of qemu_map_ram_ptr to access guest ram block area . - CVE-2017-11434: The dhcp_decode function in slirp/bootp.c allowed local guest OS users to cause a denial of service via a crafted DHCP options string . - CVE-2017-10806: Stack-based buffer overflow in hw/usb/redirect.c allowed local guest OS users to cause a denial of service via vectors related to logging debug messages . - CVE-2017-10664: qemu-nbd did not ignore SIGPIPE, which allowed remote attackers to cause a denial of service by disconnecting during a server-to-client reply attempt . - CVE-2017-12855: Premature clearing of GTF_writing / GTF_reading lead to potentially leaking sensitive information . - CVE-2017-14316: Missing bound check in function `alloc_heap_pages` for an internal array allowed attackers using crafted hypercalls to execute arbitrary code within Xen - CVE-2017-14317: A race in cxenstored may have cause a double-free allowind for DoS of the xenstored daemon . - CVE-2017-14319: An error while handling grant mappings allowed malicious or buggy x86 PV guest to escalate its privileges or crash the hypervisor . This non-security issue was fixed: - bsc#1032598: Prevent removal of NVME devices - bsc#1037413: Support for newer intel cpu"s, mwait-idle driver and skylake