/usr/share/live/build/bootloaders/pxelinux/vesamenu.c32 is in live-build 3.0~a57-1ubuntu11.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/syslinux/vesamenu.c32
/usr/lib/syslinux/vesamenu.c32