IBM i PTF Guide, Volume 28, Number 36

October 19, 2026 Doug Bidwell

Just a reminder that with IBM i 7.6 TR2 and IBM i 7.5 TR8, there is a virtual Ethernet connectivity advisory. IBM is currently investigating a reported issue affecting systems running IBM i 7.6 TR2 or IBM i 7.5 TR8. Installing the Technology Refresh (TR) can cause a complete loss of network connectivity on partitions using Virtual Ethernet adapter type 268C. IBM is actively working to identify the root cause and appropriate corrective action.

Development has identified the root cause of the issue and has released the following HIPER PTFs to address it. You can read more about this issue at this link. Note: The following fixing PTFs are expected to be available for download on 10/03/2026 to resolve the Virtual Ethernet issue:

IBM i 7.6: MJ11726
IBM i 7.5: MJ11725

There are also three different security vulnerabilities for the IBM i stack that you need to be aware of.

First, we have Security Bulletin: Multiple vulnerabilities in PostgreSQL affect PowerVM VIOS. Read the security bulletin HERE. Affected Products and Versions: VIOS 4.1.

Second, we have Security Bulletin: IBM i is Affected By Relative Path Traversal Vulnerability in OpenSSH [CVE-2026-59995], which you can read HERE. Affected Products and Versions:

IBM i Release	5733-SC1 	PTF Number(s)
7.6				SJ11774
7.5				SJ11773
7.4				SJ11772
7.3				SJ11772

Third, we have Security Bulletin: IBM i is Affected By An Improper Neutralization of Input Vulnerability in HTTP Server Administration GUI [CVE-2026-93886], which you can read HERE. Affected Products and Versions:

IBM i Release	5770-SS1	PTF Number(s)
7.6				SJ11645
7.5				SJ11644
7.4				SJ11643
7.3				SJ11641

Here is the rundown of PTF Groups by IBM i release level since we last published:

PTF Groups 7.6:

Fix list for IBM WebSphere Application Server Liberty

PTF Groups 7.5:

Fix list for IBM WebSphere Application Server Liberty

PTF Groups 7.4:

Fix list for IBM WebSphere Application Server Liberty

PTF Groups 7.3:

Fix list for IBM WebSphere Application Server Liberty

PTF Groups 7.2:

None

Tip O’ The Week: Considerations with the new GoDaddy R1-to-G2 certificate cross-chain in IBM i Digital Certificate Manager. Read this page carefully.

New (or Updated) links added to the ‘Links’ tab in The Guide this week:

None

New (or Updated) links added to the ‘QMGtools’ tab in The Guide this week:

None

New (or Updated) links added to the ‘ACS_NAV’ tab in The Guide this week:

None

New (or Updated) links added to the ‘Prtr Links’ tab in The Guide this week:

None

New (or Updated) links Redbooks added this week:

None

New (or Updated) stuff added to REF tab in The Guide this week:

None

New (or Updated) links in the TAPE tab in The Guide this week:

None

New (or Updated) links in the WAS tab in The Guide this week:

None

The Guide at a glance: There were new defectives the week of 10/10/26. Defective PTF rundown – the latest defective for each release. Click on the Defective PTF link for your release in the Guide:

	Defect		Defective	APAR		Fixing
	Date		PTF				PTF
	--------	--------	---------	-----------------------	
7.6	09/10/26	MJ10605	        DT499686	MJ11309	(When available)(read the recommendations)
			MJ10457					Read the cover letter-prerequisites!	
			MJ07695

7.5	09/21/26	MJ09778	        DT501201	MJ11495 (When available)(read the recommendations)
			MJ09292					Read the cover letter-prerequisites!

7.4	09/21/26	MJ09796	        DT501201	MJ11494	Same as above, Please read the Cover letter  
			MJ09260					(When available)(read the recommendations)
								Read the cover letter-prerequisites!

7.3	04/10/26	SJ08674	        DT467722	SJ09200 (When available)(read the recommendations)

Be sure to access the link in The Guide for further details.

Below is the usual archive of the IBM i PTF Guide to help you work through the PTFs in chronological order:

October 12, 2026: Volume 28, Number 36

October 3, 2026: Volume 28, Number 35

September 26, 2026: Volume 28, Number 34

September 19, 2026: Volume 28, Number 33

September 12, 2026: Volume 28, Number 32

September 4, 2026: Volume 28, Number 31

August 29, 2026: Volume 28, Number 30

August 22, 2026: Volume 28, Number 29

August 15, 2026: Volume 28, Number 28

August 8, 2026: Volume 28, Number 27