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-2016-7480 medium priority: Ubuntu including 2 source packages (php5, php7.0), 10 status rows across 5 suites (precise, trusty, upstream, xenial, yakkety): DNE 4, not-affected 4, needs-triage 1, released 1.
The SplObjectStorage unserialize implementation in ext/spl/spl_observer.c in PHP before 7.0.12 does not verify that a key is an object, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized memory access) via crafted serialized data.