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Security Bulletin: This Power System update is being released to address CVE-2022-22374

Security Bulletin


POWER9: In response to a security issue with firmware update, this security bulletin is being issued to address Common Vulnerabilities and Exposures issue number CVE 2022-22374. There is no Power System firmware update for this.  Please follow the Remediation and Mitigation steps.

Vulnerability Details

CVEID:   CVE-2022-22374
DESCRIPTION:   The BMC may be subject to downgrade attack which may affect its ability to operate its host.
CVSS Base score: 6.5
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H)

Affected Products and Versions

Affected Product(s)Version(s)


Customers with the products below running OP910, OP920, OP930 or OP940, follow the Mitigation steps:

1) IBM Power System AC922 (8335-GTG)

2) IBM Power System AC922 (8335-GTC, 8335-GTW)

3) IBM Power System AC922 (8335-GTH, 8335-GTX)

4) IBM Power System IC922 (9183-22X)

5) IBM Power Hardware Management Console System Firmware (7063-CR2)

Workarounds and Mitigations

Use the BMC to learn which firmware versions are currently installed on both the BMC and the host system, then verify these versions match the firmware version most recently uploaded and installed on the BMC.  The firmware versions (sometimes called firmware levels) are given in IBM FixCentral ( under the description of each firmware version.

If the firmware versions actually installed do not match the firmware versions intended to be installed, try reinstalling the firmware.  If the versions still do not match, obtain firmware from a trusted source such as your service and support representative or from IBM FixCentral.

Please note that firmware versions may be unexpected due to a number of reasons.  For example: a firmware update operation was not successful, the BMC recovered to a previous firmware version, or the problem described by CVE-2022-22374.

Get Notified about Future Security Bulletins




Patrick Williams <>

Change History

11 Mar 2022: 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. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

Document Location


[{"Business Unit":{"code":"BU009","label":"Systems - Server"},"Product":{"code":"AC922","label":"Power 9 AC922"},"Component":"BMC","Platform":[{"code":"PF050","label":"BMC"}],"Version":"OP910, OP920, OP930, OP940","Edition":""}]

Document Information

Modified date:
23 March 2022