CVE-2023-6693
Medium
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.
SeverityMedium
CVSS4.9
Exploit probability—
Product
Qemu
PublishedJan 2, 2024
First seenJan 2, 2024
Weakness typeCWE-121CWE-121
How to fix
Update
- qemu qemu8.2.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| qemu qemu | v < 8.2.1 | 8.2.1 |
| redhat enterprise_linux | 8.0, 9.0 | — |
| fedoraproject fedora | 39 | — |
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