Vulnerability Details : CVE-2012-4461
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.
Vulnerability category: Denial of service
Exploit prediction scoring system (EPSS) score for CVE-2012-4461
Probability of exploitation activity in the next 30 days: 0.04%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 6 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2012-4461
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
1.9
|
LOW | AV:L/AC:M/Au:N/C:N/I:N/A:P |
3.4
|
2.9
|
NIST |
References for CVE-2012-4461
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http://www.openwall.com/lists/oss-security/2012/11/06/14
oss-security - CVE-2012-4461 -- kernel: kvm: invalid opcode oops on SET_SREGS with OSXSAVE bit set
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http://www.securityfocus.com/bid/56414
Linux Kernel KVM CVE-2012-4461 Local Denial of Service Vulnerability
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http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.6.9
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https://bugzilla.redhat.com/show_bug.cgi?id=862900
862900 – (CVE-2012-4461) CVE-2012-4461 kernel: kvm: invalid opcode oops on SET_SREGS with OSXSAVE bit set
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https://www.suse.com/support/update/announcement/2012/suse-su-20121679-1.html
SUSE-SU-2012:1679-1
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http://article.gmane.org/gmane.comp.emulators.kvm.devel/100742
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http://rhn.redhat.com/errata/RHSA-2013-0223.html
RHSA-2013:0223 - Security Advisory - Red Hat Customer Portal
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http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html
[security-announce] openSUSE-SU-2013:0925-1: important: kernel: security
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http://rhn.redhat.com/errata/RHSA-2013-0882.html
RHSA-2013:0882 - Security Advisory - Red Hat Customer Portal
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http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git%3Ba=commit%3Bh=6d1068b3a98519247d8ba4ec85cd40ac136dbdf9
Products affected by CVE-2012-4461
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.6.5:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.6.2:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.6:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.6.6:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:3.6.7:*:*:*:*:*:*:*