This update for xen fixes the following issues: Update to Xen 4.10.2 bug fix release . Security vulnerabilities fixed: - CVE-2018-19961, CVE-2018-19962: Fixed an issue related to insufficient TLB flushing with AMD IOMMUs, which potentially allowed a guest to escalate its privileges, may cause a Denial of Service affecting the entire host, or may be able to access data it is not supposed to access. - CVE-2018-19965: Fixed an issue related to the INVPCID instruction in case non-canonical addresses are accessed, which may allow a guest to cause Xen to crash, resulting in a Denial of Service affecting the entire host. - CVE-2018-19966: Fixed an issue related to a previous fix for XSA-240, which conflicted with shadow paging and allowed a guest to cause Xen to crash, resulting in a Denial of Service . - CVE-2018-18883: Fixed an issue related to inproper restriction of nested VT-x, which allowed a guest to cause Xen to crash, resulting in a Denial of Service . - CVE-2018-15468: Fixed incorrect MSR_DEBUGCTL handling, which allowed guests to enable Branch Trace Store and may cause a Denial of Service of the entire host. - CVE-2018-15469: Fixed use of v2 grant tables on ARM, which were not properly implemented and may cause a Denial of Service . - CVE-2018-15470: Fixed an issue in the logic in oxenstored for handling writes, which allowed a guest to write memory unbounded leading to system-wide Denial of Service . - CVE-2018-3646: Mitigations for VMM aspects of L1 Terminal Fault Other bugs fixed: - Fixed an issue related to a domU hang on SLE12-SP3 HV - Fixed an issue with xpti=no-dom0 not working as expected - Fixed a kernel oops related to fs/dcache.c called by d_materialise_unique