In the Linux kernel, the following vulnerability has been resolved:

perf/x86/intel/uncore: Fix NULL pointer dereference issue in upi_fill_topology()

Get logical socket id instead of physical id in discover_upi_topology()
to avoid out-of-bound access on 'upi = &type->topology[nid][idx];' line
that leads to NULL pointer dereference in upi_fill_topology()

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-52450
• https://git.kernel.org/stable/c/1692cf434ba13ee212495b5af795b6a07e986ce4
• https://git.kernel.org/stable/c/3d6f4a78b104c65e4256c3776c9949f49a1b459e
• https://git.kernel.org/stable/c/bf1bf09e6b599758851457f3999779622a48d015