This bug was fixed in the package xen - 4.6.5-0ubuntu1 --------------- xen (4.6.5-0ubuntu1) xenial; urgency=medium * Rebasing to upstream stable release 4.6.5 (LP: #1671864) https://www.xenproject.org/downloads/xen-archives/xen-46-series.html - Includes fix for booting 4.10 Linux kernels in HVM guests on Intel hosts which support the TSC_ADJUST MSR (LP: #1671760) - Additional security relevant changes: * CVE-2013-2076 / XSA-052 (update) - Information leak on XSAVE/XRSTOR capable AMD CPUs * CVE-2016-7093 / XSA-186 (4.6.3 became vulnerable) - x86: Mishandling of instruction pointer truncation during emulation * XSA-207 - memory leak when destroying guest without PT devices - Replacing the following security fixes with the versions from the stable update: * CVE-2015-7812 / XSA-145 - arm: Host crash when preempting a multicall * CVE-2015-7813 / XSA-146 - arm: various unimplemented hypercalls log without rate limiting * CVE-2015-7814 / XSA-147 - arm: Race between domain destruction and memory allocation decrease * CVE-2015-7835 / XSA-148 - x86: Uncontrolled creation of large page mappings by PV guests * CVE-2015-7969 / XSA-149, XSA-151 - leak of main per-domain vcpu pointer array - x86: leak of per-domain profiling-related vcpu pointer array * CVE-2015-7970 / XSA-150 - x86: Long latency populate-on-demand operation is not preemptible * CVE-2015-7971 / XSA-152 - x86: some pmu and profiling hypercalls log without rate limiting * CVE-2015-7972 / XSA-153 - x86: populate-on-demand balloon size inaccuracy can crash guests * CVE-2016-2270 / XSA-154 - x86: inconsistent cachability flags on guest mappings * CVE-2015-8550 / XSA-155 - paravirtualized drivers incautious about shared memory contents * CVE-2015-5307, CVE-2015-8104 / XSA-156 - x86: CPU lockup during exception delivery * CVE-2015-8338 / XSA-158 - long running memory operations on ARM * CVE-2015-8339, CVE-2015-8340 / XSA-159 XENMEM_exchange error handling issues * CVE-2015-8341 / XSA-160 - libxl leak of pv kernel and initrd on error * CVE-2015-8555 / XSA-165 - information leak in legacy x86 FPU/XMM initialization * XSA-166 - ioreq handling possibly susceptible to multiple read issue * CVE-2016-1570 / XSA-167 - PV superpage functionality missing sanity checks * CVE-2016-1571 / XSA-168 - VMX: intercept issue with INVLPG on non-canonical address * CVE-2015-8615 / XSA-169 - x86: unintentional logging upon guest changing callback method * CVE-2016-2271 / XSA-170 - VMX: guest user mode may crash guest with non-canonical RIP * CVE-2016-3158, CVE-2016-3159 / XSA-172 - broken AMD FPU FIP/FDP/FOP leak workaround * CVE-2016-3960 / XSA-173 - x86 shadow pagetables: address width overflow * CVE-2016-4962 / XSA-175 - Unsanitised guest input in libxl device handling code * CVE-2016-4480 / XSA-176 - x86 software guest page walk PS bit handling flaw * CVE-2016-4963 / XSA-178 - Unsanitised driver domain input in libxl device handling * CVE-2016-5242 / XSA-181 - arm: Host crash caused by VMID exhaustion * CVE-2016-6258 / XSA-182 - x86: Privilege escalation in PV guests * CVE-2016-6259 / XSA-183 - x86: Missing SMAP whitelisting in 32-bit exception / event delivery * CVE-2016-7092 / XSA-185 - x86: Disallow L3 recursive pagetable for 32-bit PV guests * CVE-2016-7094 / XSA-187 - x86 HVM: Overflow of sh_ctxt->seg_reg[] * CVE-2016-7777 / XSA-190 - CR0.TS and CR0.EM not always honored for x86 HVM guests * CVE-2016-9386 / XSA-191 - x86 null segments not always treated as unusable * CVE-2016-9382 / XSA-192 - x86 task switch to VM86 mode mis-handled * CVE-2016-9385 / XSA-193 - x86 segment base write emulation lacking canonical address checks * CVE-2016-9383 / XSA-195 - x86 64-bit bit test instruction emulation broken * CVE-2016-9377, CVE-2016-9378 / XSA-196 - x86 software interrupt injection mis-handled * CVE-2016-9379, CVE-2016-9380 / XSA-198 - delimiter injection vulnerabilities in pygrub * CVE-2016-9932 / XSA-200 - x86 CMPXCHG8B emulation fails to ignore operand size override * CVE-2016-9815, CVE-2016-9816, CVE-2016-9817, CVE-2016-9818 / XSA-201 - ARM guests may induce host asynchronous abort * CVE-2016-10024 / XSA-202 - x86 PV guests may be able to mask interrupts * CVE-2016-10025 / XSA-203 - x86: missing NULL pointer check in VMFUNC emulation * CVE-2016-10013 / XSA-204 - x86: Mishandling of SYSCALL singlestep during emulation -- Stefan Bader