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Fencer Intel
medium 4.1

CVE-2010-0306 json

The x86 emulator in KVM 83, when a guest is configured for Symmetric Multiprocessing (SMP), does not use the Current Privilege Level (CPL)…

published 2010-02-12 16 y ago modified 2026-06-16 4 mo ago also EUVD-2010-0337

cvss
4.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

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.

Patch / fix

  • rhev-hypervisor RHEL 5 5.4-2.1.8.el5_4rhev2_1
  • rhev-hypervisor-pxe RHEL 5 5.4-2.1.8.el5_4rhev2_1
  • kvm RHEL 5 VIRTUALIZATION 83-105.el5_4.22
  • kmod-kvm RHEL 5 VIRTUALIZATION 83-105.el5_4.22
  • kvm-tools RHEL 5 VIRTUALIZATION 83-105.el5_4.22
  • kvm-qemu-img RHEL 5 VIRTUALIZATION 83-105.el5_4.22

red hat advisories RHSA-2010:0095RHSA-2010:0088

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2010-0306 updated cvss 6.9

kvm: emulator privilege escalation IOPL/CPL level check

  • Red Hat Enterprise Linux Desktop Multi OS (v. 5 client) kvm 83-105.el5_4.22, kmod-kvm 83-105.el5_4.22, kvm-tools 83-105.el5_4.22, kvm-qemu-img 83-105.el5_4.22 Red Hat Enterprise Linux Virtualization (v. 5 server) kvm 83-105.el5_4.22, kmod-kvm 83-105.el5_4.22, kvm-tools 83-105.el5_4.22, kvm-qemu-img 83-105.el5_4.22
    fixed: vendor fix RHSA-2010:0088
  • Red Hat Enterprise Virtualization Hypervisor 5 rhev-hypervisor 5.4-2.1.8.el5_4rhev2_1, rhev-hypervisor-pxe 5.4-2.1.8.el5_4rhev2_1
    fixed: vendor fix RHSA-2010:0095

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.1 AV:L/AC:M/Au:S/C:P/I:P/A:P

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.