This update for xen fixes the following issues: Security issues fixed: - CVE-2018-12617: Fix integer overflow that causes segmentation fault in qmp_guest_file_read with g_malloc . - CVE-2018-3665: Fix Lazy FP Save/Restore issue . - CVE-2018-11806: Fix heap buffer overflow while reassembling fragmented datagrams . - CVE-2018-12891: Fix possible Denial of Service via certain PV MMU operations that affect the entire host . - CVE-2018-12893: Fix crash/Denial of Service via safety check . Bug fixes: - bsc#1079730: Fix failed quot;writequot; lock. - bsc#1027519: Add upstream patches from January.