CVE-2012-4461
First published: Wed Oct 03 2012(Updated: )
A flaw has been found in the way Linux kernel's KVM subsystem handled vcpu->arch.cr4 X86_CR4_OSXSAVE bit set upon guest enter. On hosts without the XSAVE feature an unprivileged local user could use this flaw to crash the system. Acknowledgements: Red Hat would like to thank Jon Howell for reporting this issue.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <=3.6.8 | |
| Linux Kernel | =3.6 | |
| Linux Kernel | =3.6.1 | |
| Linux Kernel | =3.6.2 | |
| Linux Kernel | =3.6.3 | |
| Linux Kernel | =3.6.4 | |
| Linux Kernel | =3.6.5 | |
| Linux Kernel | =3.6.6 | |
| Linux Kernel | =3.6.7 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.17-1 |
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Reference Links
- http://article.gmane.org/gmane.comp.emulators.kvm.devel/100742
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git%3Ba=commit%3Bh=6d1068b3a98519247d8ba4ec85cd40ac136dbdf9
- http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html
- http://rhn.redhat.com/errata/RHSA-2013-0223.html
- http://rhn.redhat.com/errata/RHSA-2013-0882.html
- http://secunia.com/advisories/51160
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.6.9
- http://www.openwall.com/lists/oss-security/2012/11/06/14
- http://www.securityfocus.com/bid/56414
- https://bugzilla.redhat.com/show_bug.cgi?id=862900
- https://www.suse.com/support/update/announcement/2012/suse-su-20121679-1.html
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=6d1068b3a98519247d8ba4ec85cd40ac136dbdf9
- https://rhn.redhat.com/errata/RHSA-2013-0223.html
- https://rhn.redhat.com/errata/RHSA-2013-0882.html
- https://launchpad.net/bugs/cve/CVE-2012-4461
- https://security-tracker.debian.org/tracker/CVE-2012-4461
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-4461
- https://nvd.nist.gov/vuln/detail/CVE-2012-4461
- https://ubuntu.com/security/CVE-2012-4461
Frequently Asked Questions
What is the severity of CVE-2012-4461?
CVE-2012-4461 is considered a high severity vulnerability due to its potential to allow unprivileged local users to crash the system.
How do I fix CVE-2012-4461?
To fix CVE-2012-4461, upgrade your Linux kernel to a version that is 3.6.9 or higher.
Which versions of the Linux kernel are affected by CVE-2012-4461?
CVE-2012-4461 affects Linux kernel versions up to 3.6.8 and specific versions like 3.6, 3.6.1, 3.6.2, 3.6.3, 3.6.4, 3.6.5, 3.6.6, and 3.6.7.
Who discovered the vulnerability CVE-2012-4461?
The vulnerability CVE-2012-4461 was acknowledged by Red Hat, which thanked Jon Howell for reporting it.
What impact does CVE-2012-4461 have on system security?
CVE-2012-4461 can allow an unprivileged local user to crash the system, posing a risk to availability.
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