If you go to the "Ubuntu Changelog" link on the right, you can see that they've backported three security fixes (CVE-2016-5419, CVE-2016-5420, and CVE-2016-5421) since the 16.04 LTS release.
You are trusting Ubuntu's judgment that the remaining 12 CVEs aren't that important. Ubuntu's security team is pretty good, but I don't think there is any distro that is extremely good. In part this is because a distro is on the hook for compatibility of all the software they ship, and expected to prioritize compatibility over security. Anything other than targeted security fixes can cause regressions.
Comments
If you go to the "Ubuntu Changelog" link on the right, you can see that they've backported three security fixes (CVE-2016-5419, CVE-2016-5420, and CVE-2016-5421) since the 16.04 LTS release.
You are trusting Ubuntu's judgment that the remaining 12 CVEs aren't that important. Ubuntu's security team is pretty good, but I don't think there is any distro that is extremely good. In part this is because a distro is on the hook for compatibility of all the software they ship, and expected to prioritize compatibility over security. Anything other than targeted security fixes can cause regressions.