XSAs released on 2026-10-09
Key points
The Qubes OS project reports that the Xen Project published a new batch of Xen security advisories (XSAs) on 2026-10-09. None of them affects the security of Qubes OS.
Advisories covered
- XSA-522 does not affect Qubes OS security; the project classifies it as denial of service only.
- No XSA in this batch is listed as affecting Qubes OS.
What users need to do
- No user action is required.
Background
- Qubes OS is built on the Xen hypervisor, so each publicly disclosed Xen vulnerability is assessed for its impact on Qubes.
- When an XSA does affect Qubes, the project issues a Qubes security bulletin (QSB); QSBs are also issued for vulnerabilities outside Xen.
- QSBs only confirm that an XSA affects Qubes, so the project also maintains an XSA tracker listing every publicly disclosed XSA and whether it affects Qubes OS security.
- Notices like this one are published each time new XSAs are added to the tracker.
Summary by DistroNews, based on the original post.
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 XSAs do not affect the security of Qubes OS, and no user action is necessary: XSA-522: Denial of service only. About this announcement 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 an XSA tracker, which is a comprehensive list of all XSAs publicly disclosed to date, including whether each one affects the security of Qubes OS. When new XSAs are published, we add them to the XSA tracker and publish a notice like this one in order to inform Qubes users that a new batch of XSAs has been released and whether each one affects the security of Qubes OS.
This is the summary Qubes OS News published with the story. The full text is on the original page.
Read the original at qubes-os.org