Summary
Real-time mutexes in the Linux kernel implement priority inheritance, which requires walking a chain of waiting tasks whenever a waiter's priority changes. During removal of a waiter, the waiter structure is released while still linked into that chain, so a subsequent chain walk dereferences freed memory. The path is reachable from user space through priority-inheritance futexes, which any local process can use via standard threading library mutex attributes.
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 Furthermore, products that have exceeded any software maintenance time periods are also not evaluated and will not be published.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.
