LiveActive security incident?Get immediate response
CVE Record

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 handl...

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.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysis

Security readout for executives and security teams

This is a Xen hypervisor memory-mapping flaw. A user already inside a guest operating system may be able to use crafted memory mappings to gain privileges. The source bundle identifies Xen 4.6.x and earlier, but does not provide CVSS scoring or detailed business-impact boundaries. Exposure is likely limited to environments running Xen 4.6.x or earlier, especially multi-tenant or untrusted guest workloads. The bundle does not identify affected downstream package versions beyond linked vendor advisories. Treat as a high-priority virtualization risk if Xen 4.6.x or earlier is present. Business urgency is highest for hosting, lab, or cloud environments where guests are controlled by different users or customers. Mitigation focus: Review Xen XSA-176 and apply the vendor-recommended fix where applicable.; Apply relevant downstream vendor updates, including Debian DSA-3633 or Oracle OVM guidance.; Prioritize shared virtualization hosts with untrusted guest users..

Prepared

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2016-4480 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
1Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.