Qemu: virtio-net: stack buffer overflow in virtio_net_flush_tx()
CVE-2023-6693

4.9MEDIUM

Key Information:

Vendor: Red Hat
Status: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7
Vendor: CVE Published:; 2 January 2024

What is 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.

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