The image asav9-12-2-9.qcow2 is an of Cisco ASA software version 9.12(2). Official Source : Access the Cisco Software Download portal.
This article provides a complete walkthrough—from understanding the QCOW2 format to successfully booting your Cisco ASAv on a KVM-based hypervisor (like Proxmox, oVirt, or plain QEMU/KVM on Ubuntu/CentOS). Asav9-12-2-9.qcow2 Download
Version is a mature ASAv release, but be aware that Cisco strongly recommends upgrading to a later train (9.14+ or 9.18+) for critical security fixes. Use this image primarily for lab, testing, or legacy compatibility. The image asav9-12-2-9