A stack based buffer overflow was found in the virtio-net device of QEMU. This issue occurs when flushing TX in the virtionetflushtx function if guest features VIRTIONETFHASHREPORT, VIRTIOFVERSION1 and VIRTIONETFMRGRXBUF are enabled. This could allow a malicious user to overwrite local variables allocated on the stack. Specifically, the out_sg variable could be used to read a part of process memory and send it to the wire, causing an information leak.
{
"versions": [
{
"introduced": "0"
},
{
"fixed": "8.2.1"
},
{
"introduced": "0"
},
{
"last_affected": "8.0"
},
{
"introduced": "0"
},
{
"last_affected": "8.0"
},
{
"introduced": "0"
},
{
"last_affected": "9.0"
}
]
}