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Security Bulletin: The PowerVM hypervisor can assign duplicate WWPN's to virtual fiber channel adapters in peer VMs

Security Bulletin


In some cases the PowerVM hypervisor can assign duplicate WWPN's to virtual fiber channel adapters in peer VMs after a specific series of service actions are performed

Vulnerability Details

CVEID:   CVE-2021-38923
DESCRIPTION:   IBM PowerVM Hypervisor could allow a privileged user to gain access to another VM due to assigning duplicate WWPNs.
CVSS Base score: 8
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H)

Affected Products and Versions

Affected Product(s)Version(s)
PowerVM HypervisorFW1010


Customers with the product below should install FW1010.01(1010_069) or newer to remediate this concern.

Power 10

1) IBM Power System E1080 (9080-HEX)

Workarounds and Mitigations


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Change History

30 Sep 2021: Initial Publication

*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 Location


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Document Information

Modified date:
05 October 2021