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cveRedhatCVE-2011-4622
HistoryJan 27, 2012 - 3:55 p.m.

CVE-2011-4622

2012-01-2715:55:04
redhat
web.nvd.nist.gov
52
kvm
83
create_pit_timer
arch
x86
kvm
i8254.c
vulnerability
nvd
cve-2011-4622
null pointer dereference
denial of service

CVSS2

4.9

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:N/I:N/A:C

AI Score

6.4

Confidence

High

EPSS

0

Percentile

5.1%

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.

Affected configurations

Nvd
Node
redhatkvmMatch83
VendorProductVersionCPE
redhatkvm83cpe:2.3:a:redhat:kvm:83:*:*:*:*:*:*:*

CVSS2

4.9

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:N/I:N/A:C

AI Score

6.4

Confidence

High

EPSS

0

Percentile

5.1%