CVE-2010-0306: Kvm Qumranet Kvm

Medium severity, CVSS 4.1. EPSS: 0.4% chance of exploitation in the next 30 days.

The x86 emulator in KVM 83, when a guest is configured for Symmetric Multiprocessing (SMP), does not use the Current Privilege Level (CPL) and I/O Privilege Level (IOPL) to restrict instruction execution, which allows guest OS users to cause a denial of service (guest OS crash) or gain privileges on the guest OS by leveraging access to a (1) IO port or (2) MMIO region, and replacing an instruction in between emulator entry and instruction fetch, a related issue to CVE-2010-0298.

Affected products

• Kvm Qumranet Kvm: version 83 only

Published 2010-02-12. Last modified 2026-06-16.