HIGHCVSS v3.1 7.0Vulnerability
CVE-2026-101309
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.
Properties
- Severity
- HIGH
- Nvd fetched at
- 2026-10-20T21:14:08.448323+00:00
- Epss score
- 0.00117
- Cvss severity
- HIGH
- Cvss score
- 7
- Retrieved at
- 2026-10-21T01:24:48+00:00
- Last source
- FIRST EPSS
- Score
- 7
- Cvss version
- 3.1
- Cve id
- CVE-2026-101309
- Cvss vector
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- First seen by Signal
- 2026-10-18T13:39:03+00:00
- Vector
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Published at
- 2026-10-15T08:16:36.197
- Last modified
- 2026-10-16T04:18:06.357
- Epss percentile
- 0.01565
Related Entities (1)
HAS_WEAKNESS (1)
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