CVE-2026-101309
CVE-2026-101309 · Multiple vulnerabilities in bhyve device models
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 7.0 · High · EPSS 0.1%
- Published
- Updated
Affected products and versions
freebsd
- Versions
- ≥ 15.1-RELEASE, < p5: Affected (release)
- ≥ 14.5-RELEASE, < p2: Affected (release)
- ≥ 14.4-RELEASE, < p11: Affected (release)
No fix published