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Security Bulletin: A vulnerability in the Linux kernel affects PowerKVM (CVE-2016-3044)

Security Bulletin


PowerKVM is affected by a denial of service (DoS) vulnerability in the Linux kernel. This vulnerability is now fixed.

Vulnerability Details

CVEID: CVE-2016-3044
There is a denial of service vulnerability in KVM on Power where a guest can cause a host CPU to hang, spinning in an infinite loop with interrupts disabled.
CVSS Base Score: 4.3
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L)

Affected Products and Versions

PowerKVM 2.1 and PowerKVM 3.1


Customers can update PowerKVM systems by using "yum update".
Fix images are made available via Fix Central. For version 3.1, see for (3.1.0 SP2) or later.

For version 2.1, see PowerKVM Update 10 at or later. Customers running v2.1 are, in any case, encouraged to upgrade to v3.1.

For v2.1 systems currently running fix levels of PowerKVM prior to 2.1.1, please see for prerequisite fixes and instructions.

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Related information

Change History

7 July 2016 - Initial Version

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.


According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Document information

More support for: PowerKVM

Software version: 2.1, 3.1

Operating system(s): Linux

Software edition: KVM

Reference #: T1023969

Modified date: 22 July 2016