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.
| Version | Score | Severity | Vector String |
|---|---|---|---|
| 3.1 | 4.9 | Medium | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L |
| Product | Vendor | Version |
|---|---|---|
| Red Hat Enterprise Linux 6 | Red Hat | SA6150P |
| Red Hat Enterprise Linux 9 | Red Hat | SA6145P |
| Red Hat Enterprise Linux 7 | Red Hat | 23.0 ap377581 |
| Red Hat Enterprise Linux 7 | Red Hat | n/a |
| Red Hat Enterprise Linux 8 Advanced Virtualization | Red Hat | SA8145P |
| Red Hat Enterprise Linux 8 | Red Hat | QFE1952 |
| Red Hat Enterprise Linux 8 | Red Hat | < 10.0.14393.5427 |