CVE-2026-101309 (GCVE-0-2026-101309)

Vulnerability from cvelistv5 – Published: 2026-10-15 07:17 – Updated: 2026-10-16 03:56
VLAI
Title
Multiple vulnerabilities in bhyve device models
Summary
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.
Severity
7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 00:00 UTC
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
freebsd CNA under the mitre root
CNA scorecard D 60/100 over 61 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
FreeBSD FreeBSD Affected: 15.1-RELEASE , < p5 (release)
Affected: 14.5-RELEASE , < p2 (release)
Affected: 14.4-RELEASE , < p11 (release)
guessed Create a notification for this product.
Date Public
2026-10-14 18:45
Credits
Brian Delgado from Intel using Anthropic Opus 4.8 Joshua Rogers of AISLE Research Team Yuxiang Yang, Yizhou Zhao, Ao Wang, Xuewei Feng, Qi Li, and Ke Xu from Tsinghua University using GLM-5.1 from Z.ai
Show details on NVD website
To clipboard 

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