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-2016-6489 medium priority: Ubuntu including 1 source packages (nettle), 7 status rows across 7 suites (precise, trusty, upstream, wily, xenial, yakkety, zesty): released 4, ignored 1, needs-triage 1, not-affected 1.
The RSA and DSA decryption code in Nettle makes it easier for attackers to discover private keys via a cache side channel attack.