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Servers and applications

CVE-2016-1570

The PV superpage functionality in arch/x86/mm.c in Xen 3.4.0, 3.4.1, and 4.1.x through 4.6.x allows local PV guests to obtain sensitive information, cause a denial of service, gain privileges, or have unspecified other impact via a crafted page identifier (MFN) to the (1) MMUEXT_MARK_SUPER or (2) MMUEXT_UNMARK_SUPER sub-op in the HYPERVISOR_mmuext_op hypercall or (3) unknown vectors related to…

Severity
High 8.5
Published
22 Jan 2016
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
1.2% in the next 30 daysHigher than 67% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
Improper input validation (CWE-20)
Attack
Over the network · Only under certain conditions · Needs a user account · No user action needed
Attacker can
Read data · Change data · Take it down
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Sources
NVD

Description

The PV superpage functionality in arch/x86/mm.c in Xen 3.4.0, 3.4.1, and 4.1.x through 4.6.x allows local PV guests to obtain sensitive information, cause a denial of service, gain privileges, or have unspecified other impact via a crafted page identifier (MFN) to the (1) MMUEXT_MARK_SUPER or (2) MMUEXT_UNMARK_SUPER sub-op in the HYPERVISOR_mmuext_op hypercall or (3) unknown vectors related to page table updates.

From NVD.

Affected software

SoftwareAffected versions
XenServers and applications · cpe:o:xen:xen
  • Version 4.6.0
  • Version 4.5.2
  • Version 4.5.1
  • Version 4.5.0
All 30 release lines
  • Version 3.4.0
  • Version 3.4.1
  • Version 4.1.0
  • Version 4.1.1
  • Version 4.1.2
  • Version 4.1.3
  • Version 4.1.4
  • Version 4.1.5
  • Version 4.1.6
  • Version 4.1.6.1
  • Version 4.2.0
  • Version 4.2.1
  • Version 4.2.2
  • Version 4.2.3
  • Version 4.2.4
  • Version 4.2.5
  • Version 4.3.0
  • Version 4.3.1
  • Version 4.3.2
  • Version 4.3.3
  • Version 4.3.4
  • Version 4.4.0-rc1
  • Version 4.4.0
  • Version 4.4.1
  • Version 4.4.2
  • Version 4.4.3
  • Version 4.5.0
  • Version 4.5.1
  • Version 4.5.2
  • Version 4.6.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2016-1570
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2016-1570