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CVE-2011-4622

Date: January 27, 2012

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.

Severity Score

Related Resources (12)

https://nvd.nist.gov/vuln/detail/CVE-2011-4622
https://bugzilla.redhat.com/show_bug.cgi?id=769721
http://www.redhat.com/support/errata/RHSA-2012-0051.html
http://www.openwall.com/lists/oss-security/2011/12/21/7
https://access.redhat.com/security/cve/CVE-2011-4622
https://people.canonical.com/~ubuntu-security/cve/CVE-2011-4622
http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html
http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/83564
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html
http://www.securitytracker.com/id?1026559
http://www.securityfocus.com/bid/51172
https://www.mend.io/vulnerability-database/CVE-2011-4622

Severity Score

Weakness Type (CWE)

Insufficient Information

NVD-CWE-noinfo

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): COMPLETE
Additional information:

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