The latest releases of libfixbuf 2.x are below.
See also pre-releases of libfixbuf 3.x and all libfixbuf releases.
On a Redhat, Fedora, or RPM-based host, the easiest way to install libfixbuf is using the CERT Linux Forensics Tools Repository.
Follow their instructions to add the Tools Reposistory to the locations your your system looks for packages, and use yum to find the libfixbuf package and yum will install its dependencies.
An alternative is the to download the libfixbuf binary package from their site and install libfixbuf and its dependencies manually.
(SHA256=4286d94224a2d9e21937b50a87ee1e204768f30fd193f48f381a63743944bf08)
(SHA256=8c535d48120b08df1731de709f2dbd2ba8bce568ad64cac34826102caf594d84)