How to apply Oracle 19C RU - January 2026 step by step

 Hi All,

In this post i am going to share about Oracle 19C JAN-2026 RU patch apply step by step lab .

Firstly we need to login support.oracle.com and click on critical patch updates , then click on the JAN-2026 CPU patch document 

you can able to see below 

Click on database >  that will navigate to below Oracle Critical Patch Update (CPU) Jan 2026 for Oracle Database Products

Depends on your OS download the patch, here in this lab  i used Linux X86-64 bit OS for oracle 19C Database 

Click on the patch that will redirect to patch download page .. if you have valid CIS number only you can download else you can see download option disabled.

i have download that patch using right credentials, copy that patch to database server and read the read me file for pre-requisites if anything before apply the RU.

 

post copy the patch unzip

Check the current patch level in database also opatch version .

take invalid count before apply the patch on both CDB$ROOT and PDB1. 

stop the database and listener :

as part of pre-requisite we need to upgrade opatch version .

upgading the opatch version from 

[oracle@ggnode1 OPatch]$ ./opatch version

OPatch Version: 12.2.0.1.17  to 12.2.0.1.48 or later 

download and copy the latest opatch 

export PATH=/u01/app/oracle/product/19.0.0/OPatch/bin:$PATH

apply the RU 2026 database patch :

Patch applied 

start the database and listener services 

run the datapatch verbose and check the db invalid objects 

before and after invalid count same 1 

we have successfully completed the oracle database 2026 RU patch .

reference oracle note id : updates.oracle.com/Orion/Services/download?type=readme&aru=28482211

Thanks,

Srini.