UBUNTU-CVE-2017-14316

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UBUNTU-CVE-2017-14316

Summary:

Details: A parameter verification issue was discovered in Xen through 4.9.x. The function `alloc_heap_pages` allows callers to specify the first NUMA node that should be used for allocations through the `memflags` parameter; the node is extracted using the `MEMF_get_node` macro. While the function checks to see if the special constant `NUMA_NO_NODE` is specified, it otherwise does not handle the case where `node >= MAX_NUMNODES`. This allows an out-of-bounds access to an internal array.

References: https://ubuntu.com/security/CVE-2017-14316, https://xenbits.xen.org/xsa/advisory-231.html, https://www.cve.org/CVERecord?id=CVE-2017-14316