Xen security advisory (XSA) tracker

Qubes OS uses the Xen hypervisor as part of its architecture. When the Xen Project publicly discloses a vulnerability in the Xen hypervisor, they issue a notice called a Xen security advisory (XSA). Vulnerabilities in the Xen hypervisor sometimes have security implications for Qubes OS. When they do, we issue a notice called a Qubes security bulletin (QSB). (QSBs are also issued for non-Xen vulnerabilities.) However, QSBs can provide only positive confirmation that certain XSAs do affect the security of Qubes OS. QSBs cannot provide negative confirmation that other XSAs do not affect the security of Qubes OS. Therefore, we also maintain this XSA tracker, which is a comprehensive list of all XSAs publicly disclosed to date, including whether each one affects the security of Qubes OS. Shortly after a new XSA is published, we will add a new row to this tracker. If that XSA affects the security of Qubes OS, its row will also include a link to the associated Qubes security bulletin (QSB).

Under the “Is Qubes Affected?” column, there are two possible values: Yes or No.

• Yes means that the security of Qubes OS is affected.
• No means that the security of Qubes OS is not affected.

Important notes

• For the purpose of this tracker, we do not classify mere denial-of-service (DoS) attacks as affecting the security of Qubes OS. Therefore, if an XSA pertains only to DoS attacks against Qubes, the value in the “Is Qubes Affected?” column will be No.
• For simplicity, we use the present tense (“is affected”) throughout this page, but this does not necessarily mean that up-to-date Qubes installations are currently affected by any particular XSA. In fact, it is extremely unlikely that any up-to-date Qubes installations are vulnerable to any XSAs on this page, since patches are almost always published concurrently with QSBs. Please read the QSB (if any) for each XSA for patching details.
• Embargoed XSAs are excluded from this tracker until they are publicly released, since the Xen security policy does not permit us to state whether Qubes is affected prior to the embargo date.
• Unused and withdrawn XSA numbers are included in the tracker for the sake of completeness, but they are excluded from the statistics section for the sake of accuracy.
• All dates are in UTC.

Statistics

• Total time span: 13.7 years (2011-03-14 — 2024-11-12)
• Total XSAs published: 451
• Total XSAs affecting Qubes OS: 111
• Percentage of XSAs affecting Qubes OS: 24.61

Tracker