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    CVE-2011-4622

    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.

    Published:Dec 14, 2011
    Last Modified:Apr 11, 2025
    EPS:Jan 27, 2012
    EPSS Score:0.0005
    CVSS Score:4.9

    Affected Products

    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Kvm
    Vendor
    Redhat
    Product
    Rhel Virtualization

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html
    http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html
    http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/83564
    http://www.openwall.com/lists/oss-security/2011/12/21/7
    http://www.redhat.com/support/errata/RHSA-2012-0051.html
    http://www.securityfocus.com/bid/51172
    http://www.securitytracker.com/id?1026559
    https://bugzilla.redhat.com/show_bug.cgi?id=769721
    http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html
    http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html
    http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/83564
    http://www.openwall.com/lists/oss-security/2011/12/21/7
    http://www.redhat.com/support/errata/RHSA-2012-0051.html
    http://www.securityfocus.com/bid/51172
    http://www.securitytracker.com/id?1026559
    https://bugzilla.redhat.com/show_bug.cgi?id=769721

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High