grub2-bhyve, as used in FreeBSD bhyve before revision 525916 2020-02-12, mishandles font loading by a guest through a grub2.cfg file, leading to a buffer overflow.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10566
Reference (s):
- https://svnweb.freebsd.org/ports?view=revision&revision=525916