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CVE Record

CVE-2012-5634: Xen 4.2.x, 4.1.x, and 4.0, when using Intel VT-d for PCI passthrough, does not properly configure VT-d when...

Xen 4.2.x, 4.1.x, and 4.0, when using Intel VT-d for PCI passthrough, does not properly configure VT-d when supporting a device that is behind a legacy PCI Bridge, which allows local guests to cause a denial of service to other guests by injecting an interrupt.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

This issue affects older Xen hypervisors using Intel VT-d PCI passthrough with a device behind a legacy PCI bridge. A local guest could trigger interrupts that disrupt other guests. The main business risk is availability loss in shared virtualization environments, not data theft, based on the provided sources. Exposure is limited to Xen hosts on affected 4.0, 4.1.x, or 4.2.x releases using Intel VT-d for PCI passthrough, specifically with passthrough devices behind legacy PCI bridges. Systems without Xen, without VT-d passthrough, or without that bridge topology are not indicated as affected by the bundle. Prioritize if the organization still runs legacy Xen with PCI passthrough in multi-tenant or business-critical virtualization. For modern, patched, or non-passthrough environments, urgency is lower, but legacy infrastructure should be verified because the impact crosses guest boundaries. Mitigation focus: Identify Xen hosts using Intel VT-d PCI passthrough.; Check whether passthrough devices sit behind legacy PCI bridges.; Review Xen XSA-33 and distribution advisories for supported fixes..

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

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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

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1Source links

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Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

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