Core Lightning has been triaging a high volume of AI-generated CVE reports over recent weeks. Several are real, and a coordinated fix is underway.
What to do now: do not shut your node down. Restart it with --offline.
That flag stops peer connections, so no payments route in, out or through your node. It keeps running, which means it keeps watching the chain and can still act if a counterparty force-closes a channel. A node that is powered off cannot do that, and that is why switching off is the worse option.
What happens next: signed binaries will be published. Verify the signatures before you install, then bring your node back online. Source and reproducible builds follow afterwards so anyone can audit what changed.