National Cyber-Alert System
Vulnerability Summary for CVE-2012-4461
Original release date:01/22/2013
Last revised:01/28/2013
Source:
US-CERT/NIST
Overview
The KVM subsystem in the Linux kernel before 3.6.9, when running on hosts that use qemu userspace without XSAVE, allows local users to cause a denial of service (kernel OOPS) by using the KVM_SET_SREGS ioctl to set the X86_CR4_OSXSAVE bit in the guest cr4 register, then calling the KVM_RUN ioctl.
Impact
CVSS Severity (version 2.0):
Impact Subscore:
2.9
Exploitability Subscore:
3.4
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type:Allows disruption of serviceUnknown
References to Advisories, Solutions, and Tools
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External Source: CONFIRM
Name: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=6d1068b3a98519247d8ba4ec85cd40ac136dbdf9
Type: Patch Information
External Source: SUSE
Name: SUSE-SU-2012:1679
External Source: CONFIRM
Name: https://bugzilla.redhat.com/show_bug.cgi?id=862900
External Source: BID
Name: 56414
External Source: MLIST
Name: [oss-security] 20121106 CVE-2012-4461 -- kernel: kvm: invalid opcode oops on SET_SREGS with OSXSAVE bit set
External Source: CONFIRM
Name: http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.6.9
External Source: MISC
Name: http://article.gmane.org/gmane.comp.emulators.kvm.devel/100742
