Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 3.3.3 |
Related Weaknesses (CWE)
References
- http://rhn.redhat.com/errata/RHSA-2012-0676.html
- http://rhn.redhat.com/errata/RHSA-2012-0743.html
- http://secunia.com/advisories/50732
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.4
- http://www.openwall.com/lists/oss-security/2012/04/19/16
- http://www.securitytracker.com/id?1027083
- http://www.ubuntu.com/usn/USN-1577-1
- http://www.ubuntu.com/usn/USN-2036-1
- http://www.ubuntu.com/usn/USN-2037-1
- https://bugzilla.redhat.com/show_bug.cgi?id=814149
- https://github.com/torvalds/linux/commit/09ca8e1173bcb12e2a449698c9ae3b86a8a1019
- http://rhn.redhat.com/errata/RHSA-2012-0676.html
- http://rhn.redhat.com/errata/RHSA-2012-0743.html
- http://secunia.com/advisories/50732
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.4
FAQ
What is CVE-2012-2121?
CVE-2012-2121 is a vulnerability with a CVSS score of 4.9 (MEDIUM). 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 ...
How severe is CVE-2012-2121?
CVE-2012-2121 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2012-2121?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.