The Xen Project has published Xen Security Advisories 248 through 251 (XSA-248 through XSA-251). These XSAs do not affect the security of Qubes OS, and no user action is necessary.

These XSAs have been added to the XSA Tracker:

• https://www.qubes-os.org/security/xsa/#248
• https://www.qubes-os.org/security/xsa/#249
• https://www.qubes-os.org/security/xsa/#250
• https://www.qubes-os.org/security/xsa/#251