CVE-2023-6693

A stack based buffer overflow was found in the virtio-net device of QEMU.
This issue occurs when flushing TX in the virtio_net_flush_tx function if
guest features VIRTIO_NET_F_HASH_REPORT, VIRTIO_F_VERSION_1 and
VIRTIO_NET_F_MRG_RXBUF 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.

Bugs

• <https://bugzilla.redhat.com/show_bug.cgi?id=2254580&gt;

Notes