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Jon Seager

Jon Seager

Things Jon Says on Podcasts

Where to Find Them

Jon Seager has been a guest on LINUX Unplugged (4 times) , Ask Noah Show (2 times) , The Pragmatic Engineer , Self-Hosted and Rust in Production .

Recently: “692: Ubuntu’s Core Reset” on LINUX Unplugged (November 2026); “665: Patch Me If You Can” on LINUX Unplugged (May 2026); “How will AI change operating systems? Part 1: Ubuntu and Linux” on The Pragmatic Engineer (April 2026); “Canonical with Jon Seager” on Rust in Production (November 2025); “636: Engineering the Future” on LINUX Unplugged (October 2025); “Ask Noah Show 436” on Ask Noah Show (April 2025).

What They Said

“in the last six months, our kernel team have shipped more security patches than in the prior 20 years of Ubuntu. And so that's not an excuse for the vulnerability that we missed and perhaps were less timely than people would have liked.” — Jon Seager, LINUX Unplugged

Asked about a recent Linux kernel vulnerability Ubuntu was slow to fix, Seager admits the miss and points to the jump in patch volume as AI tools find vulnerabilities faster than ever.

LINUX Unplugged · 2026-11-08 Permalink → Listen →
LINUX Unplugged Around 06:52 into the episode
Speaker 4

for having me. I'm glad to be here.

Chris Fisher

…du jour right now, let's start with just all of the security stuff going on. There's been a lot of discussion about the recent IPv4 vulnerability in the Linux kernel and all of that. And I know you guys are still, as we record now, working on a fix. How's all that going? What's going on there?

Speaker 3

…One of the interesting stories that I heard from our kernel team, we've all just come back from two weeks in Mexico. We had a product roadmap sprint followed by an engineering sprint where we took over 1,100 engineers to a place in Mexico, which is kind of wild. The whole company was only 500 when I joined five years ago. But there was an interesting statistic presented to me, which was that in the last six months, our kernel team have shipped more security patches than in the prior 20 years of Ubuntu. And so that's not an excuse for the vulnerability that we missed and perhaps were less timely than people would have liked. But it is to try and give some confidence that the machine, the machine is being built and the machine is mostly working.

Speaker 1

You have taken a lot of steps recently. I mean, just over the past year to sort of advance those timelines.

Chris Fisher

I think maybe people don't appreciate

Speaker 1

that you're already shipping some of those things, even if it may have not applied fully in this case.

Speaker names come from our own diarization. The position is estimated from where the line sits in the episode.
“I think 2026 has never been a better time to think about what confinement might look like on your workstation. I think it is only a matter of time before we see very influential people having their credentials leaked because an agent did something silly.” — Jon Seager, LINUX Unplugged

Seager was defending Canonical's plan to move the Ubuntu desktop to an immutable, snap-based Core design. His argument is that AI agents running with full user permissions are a growing security risk that confinement addresses.

LINUX Unplugged · 2026-11-08 Permalink → Listen →
LINUX Unplugged Around 15:54 into the episode
Speaker 3

A little.

Speaker 1

All right. But here's the

Speaker 3

…place. Wes Payne live patch the kernel. So that's not a drawback. It also brings that lovely, I want to switch the desktop environment for a day and see what happens type effect without crapping all over your system. You can just install the KDE snap, boot that for a while, remove the KDE snap and go back to GNOME. I hope that there will be Cosmic Snaps and NIRI snaps and all the rest of it. And I think 2026 has never been a better time to think about what confinement might look like on your workstation. I think it is only a matter of time before we see very influential people having their credentials leaked because an agent did something silly. Sure. And the way I run my machine is I have very little installed on it. I have a browser, I have a chat client, I have a terminal, and then pretty much everything I do is in a LexD container or a VM or something like that. And I think that's the model we push people towards. And there is a story here on the compatibility front that really has come into focus in the last year that I couldn't…

Speaker 1

Okay. So, okay, I got to, this is a lot. So, first of all, what I caught in there is it doesn't sound like alternative desktops are out. So they're going to be able to run Plasma and Cosmic. That's all going to be still a thing.

Speaker 3

We're actually working with the KDE folks on right from the start. So we are paying a company. Who's quite heavily involved in the KDE Neon community to work alongside us, like in our teams day to day, to basically develop the KDE, like cutting-edge KDE track alongside what we're doing with the…

Speaker 1

that. What kept me from having a proper website for a long time was it just felt expensive and time consuming. I mean, for some folks, it means you have to hire someone. For others, like me, it means at least a weekend of research to look at a stack of tools. Hostinger's AI Builder flips that.…

Speaker names come from our own diarization. The position is estimated from where the line sits in the episode.

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