This update for xen fixes the following issues: These security issues were fixed: - CVE-2017-7228: Broken check in memory_exchange permited PV guest breakout . - XSA-206: Unprivileged guests issuing writes to xenstore were able to stall progress of the control domain or driver domain, possibly leading to a Denial of Service of the entire host . - CVE-2016-9603: A privileged user within the guest VM can cause a heap overflow in the device model process, potentially escalating their privileges to that of the device model process . - CVE-2017-6414: Memory leak in the vcard_apdu_new function in card_7816.c in libcacard allowed local guest OS users to cause a denial of service via vectors related to allocating a new APDU object . - CVE-2017-6505: The ohci_service_ed_list function in hw/usb/hcd-ohci.c allowed local guest OS users to cause a denial of service via vectors involving the number of link endpoint list descriptors . - CVE-2017-2633: The VNC display driver support was vulnerable to an out-of-bounds memory access issue. A user/process inside guest could use this flaw to cause DoS . These non-security issues were fixed: - bsc#1022555: Timeout in execution of /etc/xen/scripts/block add - bsc#1029827: Forward port xenstored