PYSEC-2026-864 OpenStack Nova host data access through resize/migration

The libvirt driver in OpenStack Compute Nova before 2015.1.4 kilo and 12.0.x before 12.0.3 liberty, when using raw storage and usecowimages is set to false, allows remote authenticated users to read arbitrary files via a crafted qcow2 header in an ephemeral or root disk...