Today's ISO says it is RELEASE

corrado@corrado-n6-questing:~$ cat /var/log/installer/media-info
Ubuntu 25.10 “Questing Quokka” - Release amd64 (20251005)
corrado@corrado-n6-questing:~$

https://iso.qa.ubuntu.com/qatracker/milestones/475/builds/341989/testcases/1761/results

All RC ISOs will say “Release”, but that doesn’t mean it’s final.

That information is controlled in the package base-files which must be in its final form at this time.

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That is expected as I see it, the moment the RC or Release Candidates are produced… and notice of that was a number of days ago now

The first set of initial release candidate images for the 25.10 release are now building and will be available soon at: https://iso.qa.ubuntu.com/qatracker/milestones/475/builds

So please pick up your favorite flavor images, start testing, and submit test results on the tracker.

https://lists.ubuntu.com/archives/ubuntu-release/2025-October/006552.html

I’m agreeing with Erich, except I think of it as

but that doesn’t mean it’s the final final

as if a problem is detected with an RC/final; another is produced for retesting.

Key detail in your pasted was the date of the ISO; ie. 20251005 where you can view details on the ISO tracker and see the date of the latest or current final, ie.

https://iso.qa.ubuntu.com/qatracker/milestones/475/builds

which currently are 20251005 for many, 20251006 for others etc.

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