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Fencer Intel
medium 6.8

CVE-2010-0309 json

The pit_ioport_read function in the Programmable Interval Timer (PIT) emulation in i8254.c in KVM 83 does not properly use the pit_state da…

published 16y ago modified 4mo ago also EUVD-2010-0340

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.8%
EPSS 2.8% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

The pit_ioport_read function in the Programmable Interval Timer (PIT) emulation in i8254.c in KVM 83 does not properly use the pit_state data structure, which allows guest OS users to cause a denial of service (host OS crash or hang) by attempting to read the /dev/port file.

Patch / fix

  • linux linux_kernel 2.6.33
  • 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

  • kernel Azure Linux 3.0 6.6.35.1-4
  • kernel CBL-Mariner 2.0 5.10.78.1-1

azure linux advisories AZL-34841AZL-6509

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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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-2010-0309 updated cvss 4.9

kvm: cat /dev/port in guest cause the host hang

  • 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

2.77% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:L/Au:S/C:N/I:N/A:C

Classification

Weakness
Technology feeds

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Update version information.