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CVE Record

CVE-2016-9932: CMPXCHG8B emulation in Xen 3.3.x through 4.7.x on x86 systems allows local HVM guest OS users to obtain sen...

CMPXCHG8B emulation in Xen 3.3.x through 4.7.x on x86 systems allows local HVM guest OS users to obtain sensitive information from host stack memory via a "supposedly-ignored" operand size prefix.

UnknownCVSS not scoredNot KEV-listedUpdated
Glexia's TakeAutomated analysis

Security readout for executives and security teams

This flaw lets a user inside a Xen HVM virtual machine potentially read sensitive data from the host stack memory. The attacker already needs access to a guest VM, but the issue crosses a virtualization boundary, which makes it important for hosting and multi-tenant environments. Exposure is most likely on x86 Xen deployments running versions 3.3.x through 4.7.x with HVM guests, especially where guest administrators or tenants are not fully trusted. The provided CVE data does not enumerate exact downstream product versions. Treat this as high priority where Xen supports untrusted or customer-controlled HVM guests. It is less urgent for isolated lab systems or fully trusted guests, but virtualization boundary leaks deserve prompt remediation because one tenant can potentially expose host memory data. Mitigation focus: Review Xen XSA-200 and relevant vendor advisories for fixed packages.; Update Xen hypervisors or vendor virtualization packages according to official guidance.; Prioritize shared, hosted, or multi-tenant Xen environments with HVM guests..

Prepared

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

Potential ATT&CK relevance

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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
3Source 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

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