/usr/lib/x86_64-linux-gnu/ is in libdevice-cdio-perl 0.3.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/perl5/
/usr/lib/x86_64-linux-gnu/perl5/5.20/
/usr/lib/x86_64-linux-gnu/perl5/5.20/perlcdio.so
/usr/lib/x86_64-linux-gnu/perl5/5.20/perliso9660.so
/usr/lib/x86_64-linux-gnu/perl5/5.20/perlmmc.so
/usr/lib/x86_64-linux-gnu/perl5/5.20/perlmmc.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/perliso9660.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/perlcdio.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Device/
/usr/lib/x86_64-linux-gnu/perl5/5.20/Device/Cdio.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Device/Cdio/
/usr/lib/x86_64-linux-gnu/perl5/5.20/Device/Cdio/ISO9660.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Device/Cdio/Device.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Device/Cdio/Track.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Device/Cdio/Util.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Device/Cdio/ISO9660/
/usr/lib/x86_64-linux-gnu/perl5/5.20/Device/Cdio/ISO9660/IFS.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Device/Cdio/ISO9660/FS.pm