/usr/share/ is in libxss-dev 1:1.2.1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/
/usr/share/doc/libxss-dev/
/usr/share/man/man3/XScreenSaverUnsetAttributes.3.gz
/usr/share/man/man3/XScreenSaverQueryExtension.3.gz
/usr/share/man/man3/XScreenSaverSetAttributes.3.gz
/usr/share/man/man3/XScreenSaverGetRegistered.3.gz
/usr/share/doc/libxss-dev/copyright
/usr/share/man/
/usr/share/man/man3/
/usr/share/man/man3/Xss.3.gz
/usr/share/doc/libxss-dev/changelog.Debian.gz
/usr/share/man/man3/XScreenSaverQueryInfo.3.gz
/usr/share/man/man3/XScreenSaverSuspend.3.gz
/usr/share/man/man3/XScreenSaverUnregister.3.gz
/usr/share/man/man3/XScreenSaverRegister.3.gz
/usr/share/man/man3/XScreenSaverQueryVersion.3.gz
/usr/share/man/man3/XScreenSaverAllocInfo.3.gz
/usr/share/man/man3/XScreenSaverSelectInput.3.gz