What’s Vulnerable › Vulnerabilities
CVE-2026-101311: Multiple vulnerabilities in bhyve device models
- Severity: high (CVSS 7.0 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-15 · updated 2026-10-16
- Weakness: CWE-362
Description
The framebuffer device model's maximum resolution constants were duplicated between the framebuffer and RFB modules and had gotten out of sync. Additionally, writes to the framebuffer BAR could set arbitrary width and height values without validation, and the framebuffer BAR I/O and RFB rendering threads were not synchronized. 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.
Affected products
- FreeBSD: from 15.1-RELEASE before p5; from 14.5-RELEASE before p2; from 14.4-RELEASE before p11 — fixed in p11, p2, p5
How to fix
Upgrade to a fixed version: FreeBSD p11, p2, p5. Check the vendor advisory for mitigations.
References
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