The MITRE CVE dictionary describes this issue as:
QEMU 0.8.2 allows local users to crash a virtual machine via the divisor operand to the aam instruction, as demonstrated by "aam 0x0," which triggers a divide-by-zero error.
Find out more about CVE-2007-1366 from the
MITRE CVE dictionary dictionary and
Not vulnerable. This issue did not affect Xen as shipped with Red Hat Enterprise Linux 5.