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The Qubes developers have released a patched Xen package for Qubes 3.1 & 3.2 and reiterated their intention to stop using paravirtualization altogether in the upcoming Qubes 4.0 .
 ( patch vulnerability: have released,  The Qubes developers: releaser, a patched Xen package: patch, 3.2: vulnerable system version, Qubes 4.0: patch number, Qubes 3.1: vulnerable system version) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( patch vulnerability: have released,  The Qubes developers: releaser, a patched Xen package: patch, 3.2: vulnerable system version, Qubes 4.0: patch number, Qubes 3.1: vulnerable system version) 