/usr/share/maven-repo/stax/ is in libstax-java 1.2.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/maven-repo/stax/stax/
/usr/share/maven-repo/stax/stax-api/
/usr/share/maven-repo/stax/stax-api/1.0.1/
/usr/share/maven-repo/stax/stax-api/1.0.1/stax-api-1.0.1.jar
/usr/share/maven-repo/stax/stax-api/1.0.1/stax-api-1.0.1.pom
/usr/share/maven-repo/stax/stax-api/debian/
/usr/share/maven-repo/stax/stax-api/debian/stax-api-debian.jar
/usr/share/maven-repo/stax/stax-api/debian/stax-api-debian.pom
/usr/share/maven-repo/stax/stax/1.2.0/
/usr/share/maven-repo/stax/stax/1.2.0/stax-1.2.0.jar
/usr/share/maven-repo/stax/stax/1.2.0/stax-1.2.0.pom
/usr/share/maven-repo/stax/stax/debian/
/usr/share/maven-repo/stax/stax/debian/stax-debian.jar
/usr/share/maven-repo/stax/stax/debian/stax-debian.pom