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

Summary

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**
DESCRIPTION:** 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 https://exchange.xforce.ibmcloud.com/vulnerabilities/114706 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

Remediation/Fixes

Customers can update PowerKVM systems by using “yum update”.

Fix images are made available via Fix Central. For version 3.1, see https://ibm.biz/BdHggw for 3.1.0.2 (3.1.0 SP2) or later.

For version 2.1, see PowerKVM 2.1.1.3-65. Update 10 at https://ibm.biz/BdEnT8 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 <http://download4.boulder.ibm.com/sar/CMA/OSA/05e4c/0/README&gt; for prerequisite fixes and instructions.