The v9fsiovvunmarshal function in fsdev/9p-iov-marshal.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) by sending an empty string parameter to a 9P operation.
{
"versions": [
{
"introduced": "0"
},
{
"last_affected": "2.7.1"
},
{
"introduced": "0"
},
{
"last_affected": "8.0"
}
]
}