REDHAT-BUG-862900
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.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Red Hat Linux |
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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;a=commit;h=6d1068b3a98519247d8ba4ec85cd40ac136dbdf9
- https://rhn.redhat.com/errata/RHSA-2013-0223.html
- https://rhn.redhat.com/errata/RHSA-2013-0882.html
- https://bugzilla.redhat.com/show_bug.cgi?id=862900
Frequently Asked Questions
What is the severity of REDHAT-BUG-862900?
The severity of REDHAT-BUG-862900 is considered critical due to the potential for unprivileged local users to crash the system.
How do I fix REDHAT-BUG-862900?
To fix REDHAT-BUG-862900, you should apply the latest kernel update provided by Red Hat.
Which systems are affected by REDHAT-BUG-862900?
REDHAT-BUG-862900 affects systems running the Red Hat Linux kernel without the XSAVE feature.
What is the cause of REDHAT-BUG-862900?
REDHAT-BUG-862900 is caused by a flaw in the KVM subsystem's handling of the vcpu->arch.cr4 X86_CR4_OSXSAVE bit upon guest entry.
Can this vulnerability be exploited remotely?
No, REDHAT-BUG-862900 cannot be exploited remotely as it requires local access to the system.
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