Candidate: CVE-2016-1570
PublicDate: 2016-01-22 15:59:00 UTC
References:
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1570
 http://xenbits.xen.org/xsa/advisory-167.html
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.
Ubuntu-Description:
Notes:
 mdeslaur> hypervisor packages are in universe. For
 mdeslaur> issues in the hypervisor, add appropriate
 mdeslaur> tags to each section, ex:
 mdeslaur> Tags_xen: universe-binary
 tyhicks> Feature disabled by default
 tyhicks> "Xen versions 3.4.0, 3.4.1, and from 4.1 onwards are affected."
Bugs:
Priority: low
Discovered-by: Qinghao Tang
Assigned-to:
CVSS:
 nvd: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H [8.5 HIGH]

Patches_xen:
Tags_xen: universe-binary
upstream_xen: needed
precise_xen: released (4.1.6.1-0ubuntu0.12.04.10)
trusty_xen: released (4.4.2-0ubuntu0.14.04.5)
trusty/esm_xen: DNE (trusty was released [4.4.2-0ubuntu0.14.04.5])
vivid_xen: ignored (reached end-of-life)
vivid/stable-phone-overlay_xen: DNE
vivid/ubuntu-core_xen: DNE
wily_xen: released (4.5.1-0ubuntu1.3)
devel_xen: released (4.6.0-1ubuntu4)