This update for samba fixes several issues. These security issues were fixed: - CVE-2017-12163: Prevent client short SMB1 write from writing server memory to file, leaking information from the server to the client . - CVE-2017-12150: Always enforce smb signing when it is configured . - CVE-2017-12151: Keep required encryption across SMB3 dfs redirects . These non-security issues were fixed: - Fixed error where short name length was read as 2 bytes, should be 1 - Fixed GUID string format on GetPrinter to prevent published printers from disappearing 7 . - Halt endless forest trust scan to prevent winbind from running out of memory .