A flaw was found in QEMU. The async nature of hot-unplug enables a race scenario where the net device backend is cleared before the virtio-net pci frontend has been unplugged. A malicious guest could use this time window to trigger an assertion and cause a denial of service.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-3301
• https://access.redhat.com/security/cve/CVE-2023-3301
• https://bugzilla.redhat.com/show_bug.cgi?id=2215784
• https://security.netapp.com/advisory/ntap-20231020-0008/