The following points clarify the QEMU licenses:

1) The QEMU virtual CPU core library (libqemu.a) and the QEMU PC
   system emulator are released under the GNU Lesser General Public
   License.

2) The Linux user mode QEMU emulator is released under the GNU General
   Public License.

3) QEMU is a trademark of Fabrice Bellard.

Fabrice Bellard.