Summary
KVM's shadow memory management unit records a role for each shadow page describing the paging mode and permissions it was built for, and caches that role for reuse. A mismatch between the cached role and the role a shadow page actually carries causes the page to be freed while the page table hierarchy still references it. A malicious guest can drive the mismatch and then operate on the stale entries, corrupting host kernel memory from inside the virtual machine.
Products not listed in the Impact Details section have not been evaluated. Furthermore, products that have exceeded any software maintenance time periods are also not evaluated and will not be published. Please consult End of Sale and End of Service Life - Extreme Networks for the EOL notices related to the product under question.
Products Potentially Affected
None
Impact Details
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OS/Product
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Exposure
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ExtremeAnalytics for Site Engine
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Yes
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ExtremeCloud IQ - Site Engine (XIQ-SE)
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Yes
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ExtremeControl for Site Engine
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Yes
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Repair Recommendations
ExtremeAnalytics for Site Engine:
- Fixed in 26.08.11 or later.
ExtremeCloud IQ - Site Engine (XIQ-SE):
- Fixed in 26.08.11 or later.
ExtremeControl for Site Engine:
- Fixed in 26.08.11 or later.
Please see the full Security Advisory here for more details and future updates.
