Qubes OS

Qubes OS

Reminder: Take the 2026 user survey to help shape the future of Qubes! (10-20 minutes)

As previously announced, Qubes OS User Survey 2026 is currently live! The survey will remain open for two more weeks, until 2026-07-13. Whether you’re a long-time Qubes user or haven’t even installed it yet, we want to hear about your experiences and about what matters to you. Help us m...

Qubes OS

Qubes OS 4.2 approaching end of life

Qubes OS 4.2 is scheduled to reach end-of-life (EOL) on 2026-06-21, approximately two months from the date of this announcement. Recommended actions If you’re currently using Qubes 4.2, you should upgrade to Qubes 4.3 no later than 2026-06-21. There are two ways to upgrade: Perform a cl...

Qubes OS

XSAs released on 2026-07-14

The Xen Project has released one or more Xen security advisories (XSAs). The security of Qubes OS is not affected. XSAs that DO affect the security of Qubes OS The following XSAs do affect the security of Qubes OS: (none) XSAs that DO NOT affect the security of Qubes OS The following XS...

pretix.eu

Qubes OS Summit 2026

Oct. 30 – Nov. 1, 2026

Qubes OS

QSB-114: Intel CPU data exposure vulnerability

We have published Qubes Security Bulletin (QSB) 114: Intel CPU data exposure vulnerability. The text of this QSB and its accompanying cryptographic signatures are reproduced below, followed by a general explanation of this announcement and authentication instructions. Qubes Security Bul...

Qubes OS

QSB-113: AMD CPU Opcode Cache corruption (XSA-490)

We have published Qubes Security Bulletin (QSB) 113: AMD CPU Opcode Cache corruption (XSA-490). The text of this QSB and its accompanying cryptographic signatures are reproduced below, followed by a general explanation of this announcement and authentication instructions. Qubes Security...

Qubes OS

Debian 12 (Bookworm) approaching end of life

Debian 12 (Bookworm) is currently scheduled to reach end-of-life (EOL) on 2026-06-10 (approximately one month from the date of this announcement). Please upgrade all of your Debian templates and standalones by that date. For more information, see Upgrading to avoid EOL. There are two wa...

Mastodon

Qubes OS

XSAs released on 2026-03-17

The Xen Project has released one or more Xen security advisories (XSAs). The security of Qubes OS is affected. XSAs that DO affect the security of Qubes OS The following XSAs do affect the security of Qubes OS: XSA-480 See QSB-110 XSAs that DO NOT affect the security of Qubes OS The fol...

Qubes OS

QSB-116: Multiple Xen issues (XSA-500, XSA-505, XSA-506, XSA-507)

We have published Qubes Security Bulletin (QSB) 116: Multiple Xen issues (XSA-500, XSA-505, XSA-506, XSA-507). The text of this QSB and its accompanying cryptographic signatures are reproduced below, followed by a general explanation of this announcement and authentication instructions....

Qubes OS

QSB-110: Use after free of paging structures in EPT (XSA-480)

We have published Qubes Security Bulletin (QSB) 110: Use after free of paging structures in EPT (XSA-480). The text of this QSB and its accompanying cryptographic signatures are reproduced below, followed by a general explanation of this announcement and authentication instructions. Qub...

Qubes OS

Qubes Canary 046

We have published Qubes Canary 046. The text of this canary and its accompanying cryptographic signatures are reproduced below. For an explanation of this announcement and instructions for authenticating this canary, please see the end of this announcement. Qubes Canary 046 ---===[ Qube...

Qubes OS

QSB-112: Floating Point Divider State Sampling (XSA-488)

We have published Qubes Security Bulletin (QSB) 112: Floating Point Divider State Sampling (XSA-488). The text of this QSB and its accompanying cryptographic signatures are reproduced below, followed by a general explanation of this announcement and authentication instructions. Qubes Se...

Qubes OS

XSAs released on 2026-01-27

The Xen Project has released one or more Xen security advisories (XSAs). The security of Qubes OS is not affected. XSAs that DO affect the security of Qubes OS The following XSAs do affect the security of Qubes OS: (none) XSAs that DO NOT affect the security of Qubes OS The following XS...