The mcffecdotx function in hw/net/mcffec.c in QEMU (aka Quick Emulator) does not properly limit the buffer descriptor count when transmitting packets, which allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via vectors involving a buffer descriptor with a length of 0 and crafted values in bd.flags.
{
"versions": [
{
"introduced": "0"
},
{
"last_affected": "2.7.1"
},
{
"introduced": "0"
},
{
"last_affected": "8.0"
}
]
}