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Test your applicationsUpgrade RHEL:8 virt-devel:rhel/libvirt-client to version 0:8.0.0-5.module+el8.6.0+14480+c0a3aa0f or higher.
This issue was patched in RHSA-2022:1759.
Note: Versions mentioned in the description apply only to the upstream virt-devel:rhel/libvirt-client package and not the virt-devel:rhel/libvirt-client package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.