Cannon Lake Platform Controller Hub overheats on Ubuntu 20.04

Question

My Laptop (Alienware m15 - 2018) Platform Controller Hub (Cannon Lake PCH) is overheating on Ubuntu 20.04 (without running any app) unlike Microsoft windows 10, can you please tell me how can I solve this problem?

Note that I'm using Ubuntu installed on an external SSD drive, so the USB hub controller is managing the communication with the system.

I'm using the "Temperature without third-party apps" approach from this answer as follows:

paste <(cat /sys/class/thermal/thermal_zone*/type) <(cat /sys/class/thermal/thermal_zone*/temp) | column -s $'\t' -t | sed 's/\(.\)..$/.\1°C/'

acpitz           60.0°C
iwlwifi_1        59.0°C
x86_pkg_temp     59.0°C
acpitz           27.8°C
INT3400 Thermal  20.0°C
SEN2             62.0°C
SEN3             56.0°C
SEN4             66.0°C
SEN5             45.0°C
SEN1             54.0°C
pch_cannonlake   85.0°C
B0D4             59.0°C

Edit:

Using lscpu I get:

Architecture:                    x86_64
CPU op-mode(s):                  32-bit, 64-bit
Byte Order:                      Little Endian
Address sizes:                   39 bits physical, 48 bits virtual
CPU(s):                          12
On-line CPU(s) list:             0-11
Thread(s) per core:              2
Core(s) per socket:              6
Socket(s):                       1
NUMA node(s):                    1
Vendor ID:                       GenuineIntel
CPU family:                      6
Model:                           158
Model name:                      Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz
Stepping:                        10
CPU MHz:                         2200.000
CPU max MHz:                     4100.0000
CPU min MHz:                     800.0000
BogoMIPS:                        4399.99
Virtualization:                  VT-x
L1d cache:                       192 KiB
L1i cache:                       192 KiB
L2 cache:                        1.5 MiB
L3 cache:                        9 MiB
NUMA node0 CPU(s):               0-11
Vulnerability Itlb multihit:     KVM: Mitigation: VMX disabled
Vulnerability L1tf:              Mitigation; PTE Inversion; VMX conditional cach
                                 e flushes, SMT vulnerable
Vulnerability Mds:               Mitigation; Clear CPU buffers; SMT vulnerable
Vulnerability Meltdown:          Mitigation; PTI
Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled v
                                 ia prctl and seccomp
Vulnerability Spectre v1:        Mitigation; usercopy/swapgs barriers and __user
                                  pointer sanitization
Vulnerability Spectre v2:        Mitigation; Full generic retpoline, IBPB condit
                                 ional, IBRS_FW, STIBP conditional, RSB filling
Vulnerability Srbds:             Mitigation; Microcode
Vulnerability Tsx async abort:   Not affected
Flags:                           fpu vme de pse tsc msr pae mce cx8 apic sep mtr
                                 r pge mca cmov pat pse36 clflush dts acpi mmx f
                                 xsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rd
                                 tscp lm constant_tsc art arch_perfmon pebs bts 
                                 rep_good nopl xtopology nonstop_tsc cpuid aperf
                                 mperf pni pclmulqdq dtes64 monitor ds_cpl vmx e
                                 st tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_
                                 1 sse4_2 x2apic movbe popcnt tsc_deadline_timer
                                  aes xsave avx f16c rdrand lahf_lm abm 3dnowpre
                                 fetch cpuid_fault epb invpcid_single pti ssbd i
                                 brs ibpb stibp tpr_shadow vnmi flexpriority ept
                                  vpid ept_ad fsgsbase tsc_adjust sgx bmi1 avx2 
                                 smep bmi2 erms invpcid mpx rdseed adx smap clfl
                                 ushopt intel_pt xsaveopt xsavec xgetbv1 xsaves 
                                 dtherm ida arat pln pts hwp hwp_notify hwp_act_
                                 window hwp_epp sgx_lc md_clear flush_l1d