View at Official ubuntu advisory, NVD, CVE.org · CVE detail
Freshness: upstream tracker timestamp is available; use API updated time as primary recency signal.
CVE-2015-3340 low priority: Ubuntu including 2 source packages (xen, xen-3.3), 14 status rows across 7 suites (lucid, precise, trusty, upstream, utopic, vivid, wily): DNE 6, released 4, not-affected 2, ignored 1, needs-triage 1.
Xen 4.2.x through 4.5.x does not initialize certain fields, which allows certain remote service domains to obtain sensitive information from memory via a (1) XEN_DOMCTL_gettscinfo or (2) XEN_SYSCTL_getdomaininfolist request.