In upstream changelog, a number of security bugs are solved after 0.5.1 release. I'm not sure the impact, it was just something I noticed. Attached the link to upstream change log. Below the concerned commits: pam: Fix eventfd leak: https://cgit.freedesktop.org/libfprint/fprintd/commit/?id=7e4630ced2be4b7ecdfb9d60cfe0e0d3de594411 main: Plug tiny memory leak: https://cgit.freedesktop.org/libfprint/fprintd/commit/?id=8fa3dcd5cd6f4841ae5e9789dde5c9daf302dd51 data: Stop privilege escalations in daemon: https://cgit.freedesktop.org/libfprint/fprintd/commit/?id=6494efa94e5bb27f235ed758bba971c2d609ea2f Latest stable version in tree: 0.5.0, released by upstream 2013-03-05 Latest available version upstream: 0.8.0, released 2017-09-13
No reported issues are vulnerabilities. Feel free to file a normal stabilization request.