/usr/share/applications/ is in xscreensaver-gl 5.34-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/applications/screensavers/
/usr/share/applications/screensavers/pipes.desktop
/usr/share/applications/screensavers/spheremonics.desktop
/usr/share/applications/screensavers/endgame.desktop
/usr/share/applications/screensavers/gflux.desktop
/usr/share/applications/screensavers/gleidescope.desktop
/usr/share/applications/screensavers/glslideshow.desktop
/usr/share/applications/screensavers/topblock.desktop
/usr/share/applications/screensavers/antspotlight.desktop
/usr/share/applications/screensavers/splitflap.desktop
/usr/share/applications/screensavers/geodesic.desktop
/usr/share/applications/screensavers/glcells.desktop
/usr/share/applications/screensavers/glblur.desktop
/usr/share/applications/screensavers/blinkbox.desktop
/usr/share/applications/screensavers/circuit.desktop
/usr/share/applications/screensavers/polytopes.desktop
/usr/share/applications/screensavers/glsnake.desktop
/usr/share/applications/screensavers/projectiveplane.desktop
/usr/share/applications/screensavers/queens.desktop
/usr/share/applications/screensavers/quasicrystal.desktop
/usr/share/applications/screensavers/stonerview.desktop
/usr/share/applications/screensavers/engine.desktop
/usr/share/applications/screensavers/kaleidocycle.desktop
/usr/share/applications/screensavers/antinspect.desktop
/usr/share/applications/screensavers/sonar.desktop
/usr/share/applications/screensavers/flyingtoasters.desktop
/usr/share/applications/screensavers/pulsar.desktop
/usr/share/applications/screensavers/bubble3d.desktop
/usr/share/applications/screensavers/hypertorus.desktop
/usr/share/applications/screensavers/voronoi.desktop
/usr/share/applications/screensavers/morph3d.desktop
/usr/share/applications/screensavers/moebius.desktop
/usr/share/applications/screensavers/glmatrix.desktop
/usr/share/applications/screensavers/winduprobot.desktop
/usr/share/applications/screensavers/geodesicgears.desktop
/usr/share/applications/screensavers/romanboy.desktop
/usr/share/applications/screensavers/gltext.desktop
/usr/share/applications/screensavers/cityflow.desktop
/usr/share/applications/screensavers/cubestorm.desktop
/usr/share/applications/screensavers/moebiusgears.desktop
/usr/share/applications/screensavers/mirrorblob.desktop
/usr/share/applications/screensavers/atunnel.desktop
/usr/share/applications/screensavers/glschool.desktop
/usr/share/applications/screensavers/molecule.desktop
/usr/share/applications/screensavers/sierpinski3d.desktop
/usr/share/applications/screensavers/lavalite.desktop
/usr/share/applications/screensavers/gears.desktop
/usr/share/applications/screensavers/polyhedra.desktop
/usr/share/applications/screensavers/jigglypuff.desktop
/usr/share/applications/screensavers/flipflop.desktop
/usr/share/applications/screensavers/flipscreen3d.desktop
/usr/share/applications/screensavers/lockward.desktop
/usr/share/applications/screensavers/superquadrics.desktop
/usr/share/applications/screensavers/glknots.desktop