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CVE-2013-6400: Xen 4.2.x and 4.3.x, when using Intel VT-d and a PCI device has been assigned, does not clear the flag that...

Xen 4.2.x and 4.3.x, when using Intel VT-d and a PCI device has been assigned, does not clear the flag that suppresses IOMMU TLB flushes when unspecified errors occur, which causes the TLB entries to not be flushed and allows local guest administrators to cause a denial of service (host crash) or gain privileges via unspecified vectors.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

This affects specific Xen hypervisors using Intel VT-d with assigned PCI devices. A guest administrator could potentially crash the host or gain elevated privileges, threatening availability and isolation across virtual machines. Exposure is narrow but serious where PCI passthrough is used. Organizations running Xen 4.2.x or 4.3.x on Intel VT-d hosts with PCI devices assigned to guests are the primary exposure. Standard Xen deployments without PCI passthrough are not described as affected in the provided sources. Prioritize remediation for virtualization clusters using PCI passthrough, especially shared or multi-tenant environments. The business risk is host outage or guest-to-host isolation failure, but only under the configuration described in the sources. Mitigation focus: Identify Xen hosts running 4.2.x or 4.3.x with Intel VT-d enabled.; Check Xen Project and distribution advisories for CVE-2013-6400 update guidance.; Apply relevant vendor packages from SUSE, Fedora, Gentoo, or Xen guidance..

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

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Source materials

Affected products

Products and packages named in the record

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n/an/an/aListed
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