Xen 4.4.x and earlier, when using a large number of VCPUs, does not properly handle read and write locks, which allows local x86 guest users to cause a denial of service (write denial or NMI watchdog timeout and host crash) via a large number of read requests, a different vulnerability than CVE-2014-9065.
{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "libxenstore3.0": "4.4.1-0ubuntu0.14.04.4", "libxen-4.4": "4.4.1-0ubuntu0.14.04.4", "libxen-ocaml-dev": "4.4.1-0ubuntu0.14.04.4", "libxen-dev": "4.4.1-0ubuntu0.14.04.4", "xen-hypervisor-4.3-amd64": "4.4.1-0ubuntu0.14.04.4", "xen-hypervisor-4.3-armhf": "4.4.1-0ubuntu0.14.04.4", "xen-system-amd64": "4.4.1-0ubuntu0.14.04.4", "xen-hypervisor-4.4-arm64": "4.4.1-0ubuntu0.14.04.4", "libxen-ocaml": "4.4.1-0ubuntu0.14.04.4", "xenstore-utils": "4.4.1-0ubuntu0.14.04.4", "xen-system-armhf": "4.4.1-0ubuntu0.14.04.4", "xen-hypervisor-4.1-amd64": "4.4.1-0ubuntu0.14.04.4", "xen-hypervisor-4.4-armhf": "4.4.1-0ubuntu0.14.04.4", "xen-hypervisor-4.4-amd64": "4.4.1-0ubuntu0.14.04.4", "xen-utils-common": "4.4.1-0ubuntu0.14.04.4", "xen-utils-4.4": "4.4.1-0ubuntu0.14.04.4", "xen-system-arm64": "4.4.1-0ubuntu0.14.04.4" } ] }