Xen contains a flaw that may allow an attacker to gain access to unauthorized privileges. The issue is triggered when multiple sub-operations in the transcendent memory (TMEM) hypercall fails to properly verify input or guest permissions. This may allow a local attacker to gain escalated privileges.
Local Access Required
Loss of Integrity
Currently, there are no known upgrades or patches to correct this vulnerability. It is possible to temporarily work around the flaw by implementing the following workaround: Disable TMEM.