VDB
CVE-2026-101309
CVE-2026-101309
PUBLISHED
CVSS 7 HIGH
Reported by freebsd · Published October 15, 2026
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.
Risk Scores
CVSS 3.1
7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| FreeBSD | FreeBSD | 15.1-RELEASE, 14.5-RELEASE, 14.4-RELEASE |
| FreeBSD | FreeBSD | 15.1-RELEASE, 14.5-RELEASE, 14.4-RELEASE |
Timeline
- Oct 15, 2026 EPSS Score
- Oct 15, 2026 Coalition ESS Score
- Oct 15, 2026 CVE Published
- Oct 16, 2026 EPSS Score
- Oct 16, 2026 CVE Updated
- Oct 25, 2026 EPSS Score