medium4.9
CVE-2023-6693
A stack based buffer overflow was found in the virtio-net device of QEMU.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Qemu | Qemu | before 8.2.1 |
| Redhat | Enterprise Linux | Versions 8.0, 9.0 |
| Fedoraproject | Fedora | Version 39 |
Weakness classification
References
- NVD record
- CVE.org record
- https://access.redhat.com/errata/RHSA-2024:2962
- https://access.redhat.com/errata/RHSA-2025:4492
- https://access.redhat.com/security/cve/CVE-2023-6693
- https://bugzilla.redhat.com/show_bug.cgi?id=2254580
- https://access.redhat.com/errata/RHSA-2024:2962
- https://access.redhat.com/security/cve/CVE-2023-6693
- https://bugzilla.redhat.com/show_bug.cgi?id=2254580
- https://lists.debian.org/debian-lts-announce/2025/04/msg00042.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OYGUN5HVOXESW7MSNM44E4AE2VNXQB6Y/
- https://security.netapp.com/advisory/ntap-20240208-0004/