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Security Bulletin: IBM i is Affected by Security Control Bypass and Uncontrolled Resource Consumption Vulnerabilities in IBM Java SDK and IBM Java Runtime [CVE-2026-21925, CVE-2026-21933, CVE-2026-21932, CVE-2026-21945]

Security Bulletin


Summary

IBM SDK Java Technology Edition and IBM Runtime Environment Java used by IBM i to support the building and running of Java applications are vulnerable to denial-of-service [CVE-2026-21945] and bypassing security controls to read and change data [CVE-2026-21932, CVE-2026-21933, CVE-2026-21925] as described in the vulnerability details section.

Vulnerability Details

CVEID:   CVE-2026-21945
DESCRIPTION:   Java SE is vulnerable to a denial of service, caused by an easily exploitable vulnerability issue that allows an remote attacker to cause a hang or repeatable crash of the application.
CWE:   CWE-400: Uncontrolled Resource Consumption
CVSS Source:   secalert_us@oracle.com
CVSS Base score:   7.5
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID:   CVE-2026-21932
DESCRIPTION:   Java SE could allow a remote attacker to bypass security controls and create, delete, or modify critical data or all accessible data, caused by an easily exploitable vulnerability.
CVSS Source:   secalert_us@oracle.com
CVSS Base score:   7.4
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N)

CVEID:   CVE-2026-21933
DESCRIPTION:   Java SE could allow a remote attacker to bypass security controls and perform unauthorized update, insert, delete, or read operations on accessible data, caused by an easily exploitable vulnerability.
CVSS Source:   secalert_us@oracle.com
CVSS Base score:   6.1
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)

CVEID:   CVE-2026-21925
DESCRIPTION:   Java SE could allow a remote unauthenticated attacker to bypass security controls and perform unauthorized update, insert, delete, or read operations on accessible data, caused by an difficult to exploit vulnerability.
CVSS Source:   secalert_us@oracle.com
CVSS Base score:   4.8
CVSS Vector:   (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N)

Affected Products and Versions

Affected Product(s)Affected Product Version(s)Affected Product Feature(s) or
License Program Product(s)
IBM i7.65770-JV1
IBM i7.55770-JV1
IBM i7.45770-JV1
IBM i7.35770-JV1

Remediation/Fixes

IBM i Release5770-JV1
PTF Number(s)
PTF Download Link(s)
7.6

SJ08771
SJ08786
SJ08710
SJ08711
SJ08715
SJ08732
SJ09203
SJ09199

https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08771
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08786
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08710
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08711
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08715
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08732
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ09203
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ09199

7.5SJ08770
SJ08784
SJ08690
SJ08687
SJ08709
SJ08713
SJ08714
SJ08731
SJ06315
SJ09198
SJ09202

https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08770
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08784
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08690
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08687
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08709
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08713
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08714
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08731
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ06315
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ09198
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ09202

7.4SJ08769
SJ08785
SJ08689
SJ08686
SJ08708
SJ08712
SJ09201
SJ09197
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08769
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08785
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08689
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08686
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08708
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08712
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ09201
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ09197
7.3SJ08716
SJ08772
SJ08688
SJ08685
SJ09196
SJ09200
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08716
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08772
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08688
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ08685
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ09196
https://www.ibm.com/mysupport/s/fix-information?legacy=SJ09200

IBM recommends installing the 5770-JV1 PTF Group to receive all the latest PTF(s) which includes all PTFs in the above table.

IBM i Release5770-JV1 PTF Group Number & LevelPTF Download Link(s)
7.6SF99965 Level 5https://www.ibm.com/mysupport/s/fix-information?legacy=SF99965
7.5SF99955 Level 20https://www.ibm.com/mysupport/s/fix-information?legacy=SF99955
7.4SF99665 Level 32https://www.ibm.com/mysupport/s/fix-information?legacy=SF99665
7.3SF99725 Level 41https://www.ibm.com/mysupport/s/fix-information?legacy=SF99725

IBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.

 

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

References

Off

Acknowledgement

Change History

10 Apr 2026: 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.

Disclaimer

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

Worldwide

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Document Information

Modified date:
13 April 2026

Initial Publish date:
10 April 2026

UID

ibm17269155