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-2016-2339 low priority: Ubuntu including 4 source packages (ruby1.8, ruby1.9.1, ruby2.0, ruby2.3), 24 status rows across 6 suites (precise, trusty, upstream, xenial, yakkety, zesty): DNE 13, needs-triage 4, not-affected 3, ignored 2, released 2.
An exploitable heap overflow vulnerability exists in the Fiddle::Function.new "initialize" function functionality of Ruby. In Fiddle::Function.new "initialize" heap buffer "arg_types" allocation is made based on args array length. Specially constructed object passed as element of args array can increase this array size after mentioned allocation and cause heap overflow.