QSB #059: Multiple Xen issues (XSA-337, XSA-340, XSA-343)

We have just published Qubes Security Bulletin (QSB) #059: Multiple Xen issues (XSA-337, XSA-340, XSA-343). The text of this QSB is reproduced below. This QSB and its accompanying signatures will always be available in the Qubes Security Pack (qubes-secpack).

This is a companion discussion topic for the original entry at https://www.qubes-os.org/news/2020/09/22/qsb-059/