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Security Bulletin: IBM Common Cryptographic Architecture (CCA) is vulnerable to denial of service (CVE-2022-22423)

Security Bulletin


Insufficient input validation in IBM Common Cryptographic Architecture (CCA) may affect Hardware Security Module (HSM) availability. An affected IBM 4767 or IBM 4769 HSM may be forced into a check-stop condition by specially-crafted requests from HSM users. Recovery from a check-stop condition requires manual intervention.

Vulnerability Details

CVEID:   CVE-2022-22423
DESCRIPTION:   IBM Common Cryptographic Architecture (CCA) could allow a local user to cause a denial of service due to improper input validation.
CVSS Base score: 6.5
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H)

Affected Products and Versions

Affected Product(s)Platform(s)Version(s)
CCA 5.x MTM for 4767

IBM AIX, IBM i, Linux (Intel x86 platforms)

5.0.0 - 5.7.11
CCA 7.x MTM for 4769

IBM AIX, IBM i, IBM PowerLinux, Linux (Intel x86 platforms)

7.0.0 - 7.3.43



IBM strongly recommends addressing the vulnerability now by upgrading:

Product(s)Fixed Version(s)
CCA 5.x MTM for 47675.7.12 or later
CCA 7.x MTM for 47697.3.44 or later


Platform-specific upgrade information:


For CCA 5.x for 4767, please download version 5.7.12 or later from the CCA Software Download Page.

For CCA 7.x for 4769, please download version 7.3.44 or later from the CCA Software Download Page.


The vulnerability can be fixed by applying a PTF to IBM i. Releases 7.5, 7.4, 7.3, and 7.2 of IBM i will be fixed.  Each PTF bundles updates to CCA 5.x MTM for 4767 and CCA 7.x MTM for 4769, bringing their respective firmware levels to 5.7.12 and 7.3.44 or later, respectively.

The PTF numbers containing the fix for this vulnerability are in the following table:

IBM i release

5733-CY3 IBM Cryptographic Device Manager for i PTF Number

7.2 (4767 Only)SI79701


IBM PowerLinux

For CCA 7.x for 4769, please download version 7.3.44 or later from the CCA Software Download Page.


Linux on Intel x86

For CCA 5.x for 4767, please download version 5.7.12 or later from the CCA Software Download Page.

For CCA 7.x for 4769, please download version 7.3.44 or later from the CCA Software Download Page.



Workarounds and Mitigations


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Change History

22 September 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


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Document Information

Modified date:
22 September 2022