CVE-2011-4622
The MITRE CVE dictionary describes this issue as:
The create_pit_timer function in arch/x86/kvm/i8254.c in KVM 83, and possibly other versions, does not properly handle when Programmable Interval Timer (PIT) interrupt requests (IRQs) when a virtual interrupt controller (irqchip) is not available, which allows local users to cause a denial of service (NULL pointer dereference) by starting a timer.
Find out more about CVE-2011-4622 from the MITRE CVE dictionary dictionary and NIST NVD.
Statement
This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4 and Red Hat Enterprise MRG as they did not provide support for the KVM subsystem. It has been addressed in Red Hat Enterprise 5 and 6 via https://rhn.redhat.com/errata/RHSA-2012-0051.html and https://rhn.redhat.com/errata/RHSA-2012-0350.html.
CVSS v2 metrics
| Base Score | 4.9 |
|---|---|
| Base Metrics | AV:L/AC:L/Au:N/C:N/I:N/A:C |
| Access Vector | Local |
| Access Complexity | Low |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Complete |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
Red Hat Security Errata
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux Virtualization 5 (kvm) | RHSA-2012:0051 | 2012-01-23 |
| Red Hat Enterprise Linux 6 (kernel) | RHSA-2012:0350 | 2012-03-06 |
Affected Packages State
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected |
| Red Hat Enterprise Linux 4 | kernel | Not affected |
CVE description copyright © 2017, The MITRE Corporation