CVE-2024-32668: bhyve(8) privileged guest escape via USB controller

First published: Thu Sep 05 2024(Updated: )

An insufficient boundary validation in the USB code could lead to an out-of-bounds write on the heap, with data controlled by the caller. A malicious, privileged software running in a guest VM can exploit the vulnerability 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.

Credit: secteam@freebsd.org

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