Intel CPU Hardware Local Privilege Escalation Vulnerability



Date Discovered

June 12, 2012


64-bit operating systems and virtualization software running on Intel CPU hardware are prone to a local privilege-escalation vulnerability. Attackers can exploit this issue to escalate privileges and execute arbitrary code with kernel-level privileges or to do a guest-to-host virtual machine escape. Note: This issue was previously titled 'Microsoft Windows User Mode Scheduler Local Privilege Escalation Vulnerability' but has been updated to better document the underlying issue.

Technologies Affected

  • Avaya Aura System Platform 1.0
  • Avaya Aura System Platform 6.0
  • Avaya Aura System Platform 6.0 SP2
  • Avaya Aura System Platform 6.0 SP3
  • Avaya Aura System Platform 6.0.1
  • Avaya Aura System Platform 6.0.2
  • Avaya Aura System Platform 6.2
  • Avaya CMS R16
  • Avaya CMS r15
  • Avaya Call Management System R 15
  • Avaya Call Management System R 16
  • Avaya Call Management System R16.1
  • Avaya Call Management System R16.2
  • Avaya Call Management System R16.3
  • Avaya IR 4.0
  • Bsdperimeter pfSense 2.0
  • Bsdperimeter pfSense 2.0.1
  • Debian Linux 6.0 amd64
  • Debian Linux 6.0 arm
  • Debian Linux 6.0 ia-32
  • Debian Linux 6.0 ia-64
  • Debian Linux 6.0 mips
  • Debian Linux 6.0 powerpc
  • Debian Linux 6.0 s/390
  • Debian Linux 6.0 sparc
  • Fedoraproject Fedora 15
  • Fedoraproject Fedora 16
  • Fedoraproject Fedora 17
  • FreeBSD FreeBSD 7.4
  • FreeBSD FreeBSD 8.1
  • FreeBSD FreeBSD 8.2
  • FreeBSD FreeBSD 8.3
  • FreeBSD FreeBSD 9.0
  • Gentoo Linux
  • Intel Hybrid Cloud Platform 2.5
  • Intel Hybrid Cloud Platform 3.0
  • Intel Hybrid Cloud Platform 3.1
  • Intel Hybrid Cloud Platform 3.1.1
  • Microsoft Windows 7 for x64-based Systems
  • Microsoft Windows 7 for x64-based Systems SP1
  • Microsoft Windows Server 2008 R2 for x64-based Systems
  • Microsoft Windows Server 2008 R2 for x64-based Systems SP1
  • NetBSD NetBSD 4.0
  • NetBSD NetBSD 4.1
  • NetBSD NetBSD 5.0
  • NetBSD NetBSD 5.1
  • Oracle Enterprise Linux 5
  • Redhat Enterprise Linux 5 Server
  • Redhat Enterprise Linux Desktop 5 Client
  • Redhat Enterprise Linux EUS 5.6.Z server
  • SuSE openSUSE 12.1
  • Sun Solaris 10
  • Sun Solaris 11
  • XenSource Xen 3.4
  • XenSource Xen 4.0
  • XenSource Xen 4.1.1
  • XenSource Xen 4.1.2


Permit local access for trusted individuals only. Where possible, use restricted environments and restricted shells.
To exploit this vulnerability, an attacker requires local access to an affected computer. Grant local access for trusted and accountable users only.

The vendor released an advisory and updates. Please see the references for details.



Rafal Wojtczuk of Bromium and Jan Beulich of SUSE

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