Home/CVE/The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Si
CVE

CVE-2016-4480

The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Si

The guest_walk_tables function in arch/x86/mm/guest_walk.c in Xen 4.6.x and earlier does not properly handle the Page Size (PS) page table entry bit at the L4 and L3 page table levels, which might allow local guest OS users to gain privileges via a crafted mapping of memory.

HIGH · CVSS 8.4 EPSS 0.00393
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
▤

Affected Products & Versions

2
oracle vm serverall versions
xen<= 4.6.1
▣

Scoring & Timeline

8.4
HIGH · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD18 May 2016 · 02:59 PM
CVSS VectorCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

3
suse-csafSUSE-SU-2016:2725-1
suse-csafSUSE-SU-2016:2528-1
suse-csafSUSE-SU-2016:2533-1
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.debian.org/security/2016/dsa-3633
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlVendor Advisory
http://www.securityfocus.com/bid/90710
http://www.securitytracker.com/id/1035901
http://xenbits.xen.org/xsa/advisory-176.htmlVendor Advisory
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