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Security Bulletin: Multiple Vulnerabilities in IBM® Java SDK affect IBM WebSphere Application Server and IBM WebSphere Application Server Liberty due to April 2024 CPU

Security Bulletin


There are multiple vulnerabilities in the IBM® SDK, Java™ Technology Edition that is shipped with IBM WebSphere Application Server and IBM WebSphere Application Server Liberty. The CVE(s) listed in this document might affect some configurations of IBM WebSphere Application Server traditional and IBM WebSphere Application Server Liberty. If you run your own Java code using the IBM Java Runtime delivered with this product, you should evaluate your code to determine whether the complete list of vulnerabilities is applicable to your code. For a complete list of vulnerabilities, refer to the link for "IBM Java SDK Security Bulletin" located in the References section for more information. HP fixes are on a delayed schedule.

Vulnerability Details

CVEID:   CVE-2024-21011
DESCRIPTION:   An unspecified vulnerability in Java SE related to the VM component could allow a remote attacker to cause low availability impact.
CVSS Base score: 3.7
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:N/A:L)

CVEID:   CVE-2023-38264
DESCRIPTION:   The IBM SDK, Java Technology Edition's Object Request Broker (ORB) is vulnerable to a denial of service attack in some circumstances due to improper enforcement of the JEP 290 MaxRef and MaxDepth deserialization filters.
CVSS Base score: 5.9
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
IBM WebSphere Application Server LibertyContinuous delivery
IBM WebSphere Application Server9.0
IBM WebSphere Application Server8.5


For IBM WebSphere Application Server Liberty:

  Upgrade to IBM SDK, Java Technology Edition Version 8 SR8 FP25 refer to IBM Java SDKs for Liberty

For Version 9 IBM WebSphere Application Server traditional:

Update to the IBM SDK, Java Technology Edition, Version 8 Service Refresh 8 FP25 using the instructions in the IBM Documentation Installing and updating IBM SDK, Java Technology Edition on distributed environments then use the IBM Installation Manager to access the online product repositories to install the SDK or use IBM Installation Manager and access the packages from Fixcentral.

For Version through IBM WebSphere Application Server traditional: 

For the IBM SDK, Java Technology Version that you use, upgrade to the minimal fix pack level of IBM WebSphere Application Server as noted in the interim fix below then apply the interim fixes:

For IBM SDK Java Technology Edition Version 8

  • For environments that have been upgraded to use the new default IBM SDK Version 8 bundled with IBM WebSphere Application Server Fix Pack or later: Apply interim fix PH60904 : Will upgrade you to IBM SDK, Java Technology Edition, Version 8 Service Refresh 8 FP25. 


  • Apply IBM Java SDK shipped with IBM WebSphere Application Server Fix pack 26 ( or later (targeted availability 3Q 2024).
For Application Client for IBM WebSphere Application Server:

Follow instructions above for the IBM WebSphere Application Server to download the interim fix needed for your version of the Application Client.

Workarounds and Mitigations


Get Notified about Future Security Bulletins




Change History

13 May 2024: 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


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Document Information

Modified date:
13 May 2024