Qubes OS: A reasonably secure operating system | Qubes OS
Qubes OS<br>A reasonably secure operating system
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Version 4.3.0
What others are saying
"If you're serious about security, @QubesOS is the best OS available today. It's what I use, and free."
"SecureDrop depends on Qubes OS for best-in-class isolation of sensitive workloads on journalist workstations. Providing journalists with a sane way to handle untrusted content from unknown sources is part of our job, and Qubes gives us the tools we need to do that job well."
"When I use Qubes I feel like a god. Software thinks that it's in control, that it can do what it wants? It can't. I'm in control."
"Qubes OS gives us greater confidence in the security of systems being used to remotely access our servers, mainly because powerful physical and logical privilege separation between workspaces allows our engineers to select appropriate degrees of isolation for different processes."
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Media & Press
"The world's most secure operating system assumes you've been owned."
"For those willing to put in the effort, Qubes is more secure than almost any other operating system available today."
"So Rutkowska flipped the game, this time in favor of the defenders."
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News & Announcements
QSB-114: Intel CPU data exposure vulnerability
Posted in Security on 2026-05-14
XSAs released on 2026-05-12
Posted in Security on 2026-05-13
QSB-113: AMD CPU Opcode Cache corruption (XSA-490)
Posted in Security on 2026-05-13
Debian 12 (Bookworm) approaching end of life
Posted in Announcements on 2026-05-06
XSAs released on 2026-04-28
Posted in Security on 2026-04-28
Qubes OS 4.2 approaching end of life
Posted in Announcements on 2026-04-27
Posted in Releases on 2026-04-27
XSAs released on 2026-04-17
Posted in Security on 2026-04-19
More News & Announcements
What's Inside of Qubes?
Secure Compartmentalization
Qubes brings to your personal computer the security of the Xen hypervisor, the same software relied on by many major hosting providers to isolate websites and services from each other. Learn more
Operating System Freedom
Can't decide which Linux distribution you prefer? Still need that one Windows program for work? With Qubes, you're not limited to just one OS. Learn more
Serious Privacy
With Whonix integrated into Qubes, using the Internet anonymously over the Tor network is safe and easy. Learn more
Research
Qubes virtual mini-summit 2021<br>3mdeb and the Qubes team , August 2021
Qubes Air: Generalizing the Qubes Architecture<br>Joanna Rutkowska , January 2018
Introducing the Next Generation Qubes Core Stack<br>Joanna Rutkowska , October 2017
Introducing the Qubes Admin API<br>Joanna Rutkowska , June 2017
Thoughts on the "physically secure" ORWL computer<br>Joanna Rutkowska , September 2016
Security challenges for the Qubes build process<br>Joanna Rutkowska , May 2016
Read More Research
Partners
Mullvad
Freedom of the Press Foundation
Invisible Things Lab
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Join the Community!
Have questions or need a hand? As a free and open-source project, our valued community of users and contributors from around the world are in the best position to help. Before diving in, we encourage you to read about staying safe, our discussion guidelines, and our code of conduct to help keep things positive and on-track. We welcome newcomers and returning users wanting to discuss Qubes and seeking to contribute.
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