REDHAT-BUG-649920
First published: Thu Nov 04 2010(Updated: )
Description of problem: Structures kvm_vcpu_events, kvm_debugregs, kvm_pit_state2 and kvm_clock_data are copied to userland with some padding and reserved fields unitialized. It leads to leaking of contents of kernel stack memory. Reference: <a href="http://www.spinics.net/lists/kvm/msg44130.html">http://www.spinics.net/lists/kvm/msg44130.html</a> <a href="http://git.kernel.org/?p=virt/kvm/kvm.git;a=commit;h=831d9d02f9522e739825a51a11e3bc5aa531a905">http://git.kernel.org/?p=virt/kvm/kvm.git;a=commit;h=831d9d02f9522e739825a51a11e3bc5aa531a905</a> Acknowledgements: Red Hat would like to thank Vasiliy Kulikov of Openwall for reporting this issue.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Red Hat QEMU-KVM |
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Reference Links
- http://www.spinics.net/lists/kvm/msg44130.html
- http://git.kernel.org/?p=virt/kvm/kvm.git;a=commit;h=831d9d02f9522e739825a51a11e3bc5aa531a905
- http://git.kernel.org/linus/97e69aa62f8b5d338d6cff49be09e37cc1262838
- https://rhn.redhat.com/errata/RHSA-2010-0998.html
- https://rhn.redhat.com/errata/RHSA-2011-0883.html
- https://bugzilla.redhat.com/show_bug.cgi?id=649920
Frequently Asked Questions
What is the severity of REDHAT-BUG-649920?
The severity of REDHAT-BUG-649920 is considered high due to potential kernel memory leakage.
How do I fix REDHAT-BUG-649920?
To fix REDHAT-BUG-649920, apply the latest patches and updates provided by Red Hat for KVM.
What software is affected by REDHAT-BUG-649920?
REDHAT-BUG-649920 affects Red Hat KVM as the primary software that is impacted.
What kind of vulnerability is REDHAT-BUG-649920?
REDHAT-BUG-649920 is a vulnerability that allows for the leakage of kernel stack memory contents.
Is there a risk of exploitation associated with REDHAT-BUG-649920?
Yes, there is a risk of exploitation associated with REDHAT-BUG-649920, as it allows unauthorized access to sensitive kernel memory.
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- canonical/red hat qemu-kvm