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CVE Watch15 oct 2026

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

CVSS

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Sin CVSS

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 15 oct 2026 · Última mod.: 15 oct 2026 · CWE-362

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

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.

Referencias oficiales
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