CVE-2012-2121

Description

The 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.

Category

4.9
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.10%
Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://secunia.com/advisories/50732 third party advisory
http://rhn.redhat.com/errata/RHSA-2012-0743.html vendor advisory
http://www.securitytracker.com/id?1027083 vdb entry
http://www.openwall.com/lists/oss-security/2012/04/19/16 mailing list
https://bugzilla.redhat.com/show_bug.cgi?id=814149
https://github.com/torvalds/linux/commit/09ca8e1173bcb12e2a449698c9ae3b86a8a10195
http://www.ubuntu.com/usn/USN-1577-1 vendor advisory
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.4
http://www.ubuntu.com/usn/USN-2036-1 vendor advisory
http://www.ubuntu.com/usn/USN-2037-1 vendor advisory
http://rhn.redhat.com/errata/RHSA-2012-0676.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2012-2121?
CVE-2012-2121 has been scored as a medium severity vulnerability.
How to fix CVE-2012-2121?
To fix CVE-2012-2121, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2012-2121 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2012-2121 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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