fileio.c in Vim prior to 8.0.1263 sets the group ownership of a .swp file to the editor"s primary group , which allows local users to obtain sensitive information by leveraging an applicable group membership, as demonstrated by /etc/shadow owned by root:shadow mode 0640, but /etc/.shadow.swp owned by root:users mode 0640, a different vulnerability than CVE-2017-1000382.