CVE-2013-6400

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Summary

CVECVE-2013-6400
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2013-12-13 18:55:05 UTC
Updated2026-04-29 01:13:23 UTC
DescriptionXen 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.

Risk And Classification

Primary CVSS: v2.0 6.8 from [email protected]

AV:A/AC:H/Au:N/C:C/I:C/A:C

EPSS: 0.006610000 probability, percentile 0.476160000 (date 2026-07-21)

Problem Types: CWE-264 | n/a

CVSS v2.0 Breakdown

Access Vector
Adjacent
Access Complexity
High
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete

AV:A/AC:H/Au:N/C:C/I:C/A:C

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Xen Xen 4.2.0 All All All
Operating System Xen Xen 4.2.1 All All All
Operating System Xen Xen 4.2.2 All All All
Operating System Xen Xen 4.2.3 All All All
Operating System Xen Xen 4.3.0 All All All
Operating System Xen Xen 4.3.1 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Xen IOMMU TLB Flush Flaw Lets Local Users Gain Elevated Privileges - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com
oss-security - Xen Security Advisory 80 (CVE-2013-6400) - IOMMU TLB flushing may be inadvertently suppressed af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
Security Advisory SA55932 - Xen IOMMU TLB Flushing Suppress Flag Privilege Escalation Vulnerability - Secunia af854a3a-2127-422b-91ae-364da2661108 secunia.com Vendor Advisory
[SECURITY] Fedora 18 Update: xen-4.2.3-12.fc18 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[security-announce] SUSE-SU-2014:0373-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
Xen project Mailing List af854a3a-2127-422b-91ae-364da2661108 lists.xen.org
Gentoo Linux Documentation -- Xen: Multiple Vunlerabilities af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org
[SECURITY] Fedora 19 Update: xen-4.2.3-12.fc19 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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