CVE-2023-6693 Information

Description

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.

Reference

https://access.redhat.com/security/cve/CVE-2023-6693 https://bugzilla.redhat.com/show_bug.cgi?id=2254580