As of today Google still has not fixed the vulnerability on Pixel 6 a device that Google promised it would provide security fixes for 5 years disclosed by the Project Zero which is a Google suborg.
It was patched before the public disclosure, go read the security bulletin [1]. CVE-2023-24033, CVE-2023-26496, CVE-2023-26497, and CVE-2023-26498 are the big modem vulnerabilities.