CVE-2024-42134 virtio-pci: Check if is_avq is NULL
A null pointer dereference in the Linux kernel's virtio-pci driver allows local attackers to crash the system via specific device attachment operations.
- 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-2024-42134?
CVE-2024-42134 is a medium-severity vulnerability in Linux kernel, published on 30 Jul 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
virtio-pci: Check if is_avq is NULL
[bug] In the virtio_pci_common.c function vp_del_vqs, vp_dev->is_avq is involved to determine whether it is admin virtqueue, but this function vp_dev->is_avq may be empty. For installations, virtio_pci_legacy does not assign a value to vp_dev->is_avq.
[fix] Check whether it is vp_dev->is_avq before use.
[test] Test with virsh Attach device Before this patch, the following command would crash the guest system
After applying the patch, everything seems to be working fine.
Weakness: CWE-476
Which versions are affected by CVE-2024-42134?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-42134?
Apply the vendor's patch.
Is CVE-2024-42134 being exploited?
There is no known exploitation of CVE-2024-42134 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-54111, AZL-54122, BELL-CVE-2024-42134, DEBIAN-CVE-2024-42134, GHSA-jv48-qx8c-4x4f, ROOT-OS-UBUNTU-2204-CVE-2024-42134 and 1 more.