/usr/include/KF5/libkleo/ is in libkf5libkleo-dev 4:17.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/KF5/libkleo/checksumdefinition.h
/usr/include/KF5/libkleo/classify.h
/usr/include/KF5/libkleo/cryptoconfigdialog.h
/usr/include/KF5/libkleo/cryptoconfigmodule.h
/usr/include/KF5/libkleo/defaultkeyfilter.h
/usr/include/KF5/libkleo/defaultkeygenerationjob.h
/usr/include/KF5/libkleo/directoryserviceswidget.h
/usr/include/KF5/libkleo/dn.h
/usr/include/KF5/libkleo/dnattributeorderconfigwidget.h
/usr/include/KF5/libkleo/enum.h
/usr/include/KF5/libkleo/exception.h
/usr/include/KF5/libkleo/filenamerequester.h
/usr/include/KF5/libkleo/filesystemwatcher.h
/usr/include/KF5/libkleo/formatting.h
/usr/include/KF5/libkleo/kconfigbasedkeyfilter.h
/usr/include/KF5/libkleo/kdhorizontalline.h
/usr/include/KF5/libkleo/keyapprovaldialog.h
/usr/include/KF5/libkleo/keycache.h
/usr/include/KF5/libkleo/keyfilter.h
/usr/include/KF5/libkleo/keyfiltermanager.h
/usr/include/KF5/libkleo/keylistmodel.h
/usr/include/KF5/libkleo/keylistmodelinterface.h
/usr/include/KF5/libkleo/keylistsortfilterproxymodel.h
/usr/include/KF5/libkleo/keyrearrangecolumnsproxymodel.h
/usr/include/KF5/libkleo/keyrequester.h
/usr/include/KF5/libkleo/keyselectioncombo.h
/usr/include/KF5/libkleo/keyselectiondialog.h
/usr/include/KF5/libkleo/kleo_export.h
/usr/include/KF5/libkleo/messagebox.h
/usr/include/KF5/libkleo/oidmap.h
/usr/include/KF5/libkleo/predicates.h
/usr/include/KF5/libkleo/progressdialog.h
/usr/include/KF5/libkleo/stl_util.h
/usr/include/KF5/libkleo/subkeylistmodel.h
/usr/include/KF5/libkleo/useridlistmodel.h