The new release includes 26 security fixes. The Heimdal Kerberos man-in-the-middle vulnerability was parched this week for both Microsoft and Linux distros. The new version includes a number of Linux updates and patches for OpenVPN flaws (including recently fixed CVE-2017-7508, CVE-17-7520, and CVE-1989-1000381) The release isnt a new version or bring new features, it only updates the existing packages with a special focus on cyber security.”]
Source: https://securityaffairs.co/wordpress/61315/security/debian-9-1-security-issues.html