CVE-2024-42134 Information

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.

Reference

https://git.kernel.org/stable/c/5e2024b0b9b3d5709e3f7e9b92951d7e29154106 https://git.kernel.org/stable/c/c8fae27d141a32a1624d0d0d5419d94252824498