Multiple vulnerabilities in bhyve device models
CVSS score
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EPSS probability
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Risk score
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Published
3 h ago
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Vulnerability description
CVE AI research
DayBreach AI Explanation
Verified against sourcesSources read
2
Source agreement
Tam uyum
Evidence confidence
%63
Short explanation
CVE-2026-101309 is a race condition vulnerability in the bhyve xHCI device model stemming from guest memory handling [S0]. This flaw allows malicious guests to crash the bhyve process or potentially execute arbitrary code in the host userspace context [S0].
This vulnerability matters because it poses a risk of escaping the virtual machine boundary into the host userspace context and compromising bhyve process integrity [S0].
What should be done?
- Follow vendor security advisories [S0]
- Review the relevant FreeBSD advisory document [S0]
Chain of evidence and sources
CVE-2026-101309 zafiyeti, xHCI aygıt modelindeki yarış koşulundan kaynaklanmaktadır.
Açık, konuk sistemde çalışan kötü amaçlı ve ayrıcalıklı kodlar aracılığıyla tetiklenebilir.
Show the technical text from the sources
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.
CWE: CWE-362
Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-101309 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | freebsd | freebsd | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| The sources have not yet published a verified CVSS metric. | ||||
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-101309 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-101309 weaknesses.
Official Sources and Advisories
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