/usr/share/perl5/CHI/Driver/Memcached/ is in libchi-driver-memcached-perl 0.14-4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/CHI/Driver/Memcached/Base.pm
/usr/share/perl5/CHI/Driver/Memcached/Fast.pm
/usr/share/perl5/CHI/Driver/Memcached/Test/
/usr/share/perl5/CHI/Driver/Memcached/Test/Driver/
/usr/share/perl5/CHI/Driver/Memcached/Test/Driver.pm
/usr/share/perl5/CHI/Driver/Memcached/Test/Driver/Base.pm
/usr/share/perl5/CHI/Driver/Memcached/Test/Driver/Fast.pm
/usr/share/perl5/CHI/Driver/Memcached/Test/Driver/Memcached.pm
/usr/share/perl5/CHI/Driver/Memcached/Test/Driver/libmemcached.pm
/usr/share/perl5/CHI/Driver/Memcached/libmemcached.pm
/usr/share/perl5/CHI/Driver/Memcached/t/
/usr/share/perl5/CHI/Driver/Memcached/t/CHIDriverTests/
/usr/share/perl5/CHI/Driver/Memcached/t/CHIDriverTests/Base.pm
/usr/share/perl5/CHI/Driver/Memcached/t/CHIDriverTests/Fast.pm
/usr/share/perl5/CHI/Driver/Memcached/t/CHIDriverTests/Memcached.pm
/usr/share/perl5/CHI/Driver/Memcached/t/CHIDriverTests/libmemcached.pm