CVE-2012-2121

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Summary

CVECVE-2012-2121
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2012-05-17 11:00:38 UTC
Updated2026-04-29 01:13:23 UTC
DescriptionThe KVM implementation in the Linux kernel before 3.3.4 does not properly manage the relationships between memory slots and the iommu, which allows guest OS users to cause a denial of service (memory leak and host OS crash) by leveraging administrative access to the guest OS to conduct hotunplug and hotplug operations on devices.

Risk And Classification

Primary CVSS: v2.0 4.9 from [email protected]

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

Problem Types: CWE-264 | n/a

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

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

References

ReferenceSourceLinkTags
USN-1577-1: Linux kernel (OMAP4) vulnerabilities | Ubuntu af854a3a-2127-422b-91ae-364da2661108 www.ubuntu.com
USN-2037-1: Linux kernel (EC2) vulnerabilities | Ubuntu af854a3a-2127-422b-91ae-364da2661108 www.ubuntu.com
Security Alerts - Secunia af854a3a-2127-422b-91ae-364da2661108 secunia.com
Linux Kernel KVM Memory Slot Management Flaw Lets Local Guest Users Deny Service on the Guest Operating System - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com
www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.4 af854a3a-2127-422b-91ae-364da2661108 www.kernel.org
KVM: unmap pages from the iommu when slots are removed · torvalds/linux@09ca8e1 · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com
oss-security - Re: CVE request -- kernel: kvm: device assignment page leak af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 rhn.redhat.com
Bug 814149 – CVE-2012-2121 kvm: device assignment page leak af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 rhn.redhat.com
USN-2036-1: Linux kernel vulnerabilities | Ubuntu af854a3a-2127-422b-91ae-364da2661108 www.ubuntu.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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