CVE-2024-4693 Qemu-kvm: virtio-pci: improper release of configure vector leads to guest triggerable crash
A malicious guest can crash the QEMU host process by triggering an improper release of the configure vector during boot.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-4693?
CVE-2024-4693 is a medium-severity denial of service vulnerability in Red Hat Enterprise Linux 6, published on 10 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in the QEMU Virtio PCI Bindings (hw/virtio/virtio-pci.c). An improper release and use of the irqfd for vector 0 during the boot process leads to a guest triggerable crash via vhost_net_stop(). This flaw allows a malicious guest to crash the QEMU process on the host.
Weakness: CWE-672
Which versions are affected by CVE-2024-4693?
How do I fix CVE-2024-4693?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-4693 being exploited?
There is no known exploitation of CVE-2024-4693 in the wild and no public exploit code.
Sources
Also known as AZL-60919, BELL-CVE-2024-4693, DEBIAN-CVE-2024-4693, GHSA-c58x-2x8h-gwq3, UBUNTU-CVE-2024-4693.