CVE-2026-101309 — Multiple vulnerabilities in bhyve device models
The xHCI (USB 3) device model did not validate or save the event ring size provided by the guest. The size was re-read from guest memory on each use, and Transfer Request Block…
Published: 2026-10-15 · CVSS: 7.0 · CVSS 3.1
The xHCI (USB 3) device model did not validate or save the event ring size provided by the guest. The size was re-read from guest memory on each use, and Transfer Request Block (TRB) fields were loaded without protection against concurrent modification by the guest. This race condition could be triggered by a guest running malicious, privileged code. A malicious guest can crash the bhyve process or potentially execute arbitrary code in the host userspace context running the virtual machine, subject to bhyve's Capsicum sandbox.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7