Any insight into the most severe ones, eg is remote exploitation possible and likely?

The Linux project request CVEs for any memory safety bug just in case some turn out to be vulnerabilities, in which case they may be exploited given enough effort. Many are likely not exploitable or unlikely to be, and/or low severity.

There are some higher severity ones given the following message. But this doesn’t mean all CVEs listed are severe issues.

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.