IBM Support

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 <[email protected]>

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.


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

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