Qemu before version 2.9 is vulnerable to an improper link following when built with the VirtFS. A privileged user inside guest could use this flaw to access host file system beyond the shared folder and potentially escalating their privileges on a host.
{
"versions": [
{
"introduced": "0"
},
{
"fixed": "2.9"
},
{
"introduced": "0"
},
{
"last_affected": "8.0"
}
]
}