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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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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.


Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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Document Information

Modified date:
17 June 2018