Non-transparent sharing of branch predictor selectors between contexts in some Intel(R) Processors may allow an authorized user to potentially enable information disclosure via local access.
https://www.oracle.com/security-alerts/cpujul2022.html
https://www.kb.cert.org/vuls/id/155143
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00598.html