The ctl_report_supported_opcodes function did not sufficiently validate a field provided by userspace, allowing an arbitrary write to a limited amount of kernel help memory.

Malicious software running in a guest VM that exposes virtio_scsi can exploit the vulnerabilities to achieve code execution on the host in the bhyve userspace process, which typically runs as root.  Note that bhyve runs in a Capsicum sandbox, so malicious code is constrained by the capabilities available to the bhyve process.  A malicious iSCSI initiator could achieve remote code execution on the iSCSI target host.

FreeBSD CWE-790

FreeBSD CWE-823

FreeBSD https://security.freebsd.org/advisories/FreeBSD-SA-24:11.ctl.asc [No types assigned]