Tails 7.7.3

Tails 7.7.3 is an emergency release addressing a critical Linux kernel security vulnerability called Dirty Frag (CVE), which could allow privilege escalation and full system compromise. The update also patches security issues in Tor Browser (updated to 15.0.12) and the Tor client (updated to 0.4.9.8), plus a Thunderbird update to 140.10.1. Automatic upgrades are available from Tails 7.0 or later.