CVE-2024-42134

Summary

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.

Affected Software

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

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

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

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

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