Xen contains a flaw that may allow an attacker to gain access to unauthorized privileges. The issue is triggered when the PHYSDEVOP_get_free_pirq hypercall fails to confirm its call to get_free_pirq succeeded, resulting in the use of the error code in an array when the call fails. This will allow a local attacker to gain escalated privileges.
Local Access Required
Loss of Integrity
It has been reported that this issue has been fixed. Upgrade to version 4.1.4, or higher, to address this vulnerability.
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