CVE-2017-14316: Xen

High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Xen Xen: up to and including 4.9.0

Published 2017-09-12. Last modified 2026-06-17.