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.
Affected products
qemu: qemu; redhat: enterprise linux; fedoraproject: fedora
References10
- bugzilla.redhat.com/show_bug.cgi?id=2254580 Issue TrackingPatch
- bugzilla.redhat.com/show_bug.cgi?id=2254580 Issue TrackingPatch
- access.redhat.com/errata/RHSA-2024:2962
- access.redhat.com/errata/RHSA-2025:4492
- access.redhat.com/security/cve/CVE-2023-6693 Third Party Advisory
- access.redhat.com/errata/RHSA-2024:2962
- access.redhat.com/security/cve/CVE-2023-6693 Third Party Advisory
- lists.debian.org/debian-lts-announce/2025/04/msg00042.html
- lists.fedoraproject.org/archives/list/[email protected]…
- security.netapp.com/advisory/ntap-20240208-0004/
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L - EPSS — exploit probability
- 0% percentile: 26 · as of 5 November 2026
- CWE
- CWE-121CWE-787
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