/usr/share/ is in amd64-microcode 3.20180524.1~ubuntu0.14.04.2+really20130710.1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/
/usr/share/doc/amd64-microcode/
/usr/share/doc/amd64-microcode/README
/usr/share/doc/amd64-microcode/changelog.gz
/usr/share/doc/amd64-microcode/microcode_amd.bin.README
/usr/share/doc/amd64-microcode/README.Debian
/usr/share/doc/amd64-microcode/copyright
/usr/share/doc/amd64-microcode/microcode_amd_fam15h.bin.README
/usr/share/initramfs-tools/
/usr/share/initramfs-tools/hooks/
/usr/share/initramfs-tools/hooks/amd64_microcode
/usr/share/initramfs-tools/scripts/
/usr/share/initramfs-tools/scripts/init-premount/
/usr/share/initramfs-tools/scripts/init-premount/amd64_microcode