How to fix CVE-2018-364 vulnerability

I have found a log in my /log/messages showing a CVE-2018-3646 error with the following link, (https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html) . I have accessed the mentioned file-path from the link (/sys/devices/system/cpu/vulnerabilities/l1tf) to check for specific vulnerabilities and it said 'Mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable'. How can I fix this? Could there be any possible consequences from altering these settings?