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CVE-2023-52450 is a flaw in the Linux kernel Intel uncore performance-monitoring UPI topology-discovery code. The discover_upi_topology() routine used a physical socket identifier where a logical socket identifier was required. This can index the UPI topology array out of bounds and leave topology state invalid, subsequently causing a NULL-pointer dereference in upi_fill_topology(). The fix obtains and uses the logical socket ID for topology lookup.
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NULL-pointer dereference in Linux kernel Intel topology handling.
NULL-pointer dereference in the Linux kernel Intel topology handling code.
A Linux kernel perf/x86 Intel uncore topology-discovery flaw where use of a physical rather than logical socket ID can cause an out-of-bounds topology-array access and subsequent NULL-pointer dereference in upi_fill_topology().
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Cross-references every affected SKU, including bundled OEM variants.
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