/usr/include/osgUtil/ is in libopenscenegraph-dev 3.2.1-6.
This file is owned by root:root, with mode 0o755.
..
/usr/include/osgUtil/ConvertVec
/usr/include/osgUtil/CubeMapGenerator
/usr/include/osgUtil/CullVisitor
/usr/include/osgUtil/DelaunayTriangulator
/usr/include/osgUtil/DisplayRequirementsVisitor
/usr/include/osgUtil/DrawElementTypeSimplifier
/usr/include/osgUtil/EdgeCollector
/usr/include/osgUtil/Export
/usr/include/osgUtil/GLObjectsVisitor
/usr/include/osgUtil/HalfWayMapGenerator
/usr/include/osgUtil/HighlightMapGenerator
/usr/include/osgUtil/IncrementalCompileOperation
/usr/include/osgUtil/IntersectVisitor
/usr/include/osgUtil/IntersectionVisitor
/usr/include/osgUtil/LineSegmentIntersector
/usr/include/osgUtil/MeshOptimizers
/usr/include/osgUtil/OperationArrayFunctor
/usr/include/osgUtil/Optimizer
/usr/include/osgUtil/PerlinNoise
/usr/include/osgUtil/PlaneIntersector
/usr/include/osgUtil/PolytopeIntersector
/usr/include/osgUtil/PositionalStateContainer
/usr/include/osgUtil/PrintVisitor
/usr/include/osgUtil/ReflectionMapGenerator
/usr/include/osgUtil/RenderBin
/usr/include/osgUtil/RenderLeaf
/usr/include/osgUtil/RenderStage
/usr/include/osgUtil/ReversePrimitiveFunctor
/usr/include/osgUtil/SceneGraphBuilder
/usr/include/osgUtil/SceneView
/usr/include/osgUtil/ShaderGen
/usr/include/osgUtil/Simplifier
/usr/include/osgUtil/SmoothingVisitor
/usr/include/osgUtil/StateGraph
/usr/include/osgUtil/Statistics
/usr/include/osgUtil/TangentSpaceGenerator
/usr/include/osgUtil/Tessellator
/usr/include/osgUtil/TransformAttributeFunctor
/usr/include/osgUtil/TransformCallback
/usr/include/osgUtil/TriStripVisitor
/usr/include/osgUtil/UpdateVisitor
/usr/include/osgUtil/Version