How is the operating kernel NOT a security concern?
Linux has many CVEs:
https://lore.kernel.org/linux-cve-announce/
Many of those CVEs are due to weaknesses in the C programming language:
https://www.cvedetails.com/product/47/Linux-Linux-Kernel.htm...
Many of those CVEs are exploitable:
https://arstechnica.com/security/2024/05/federal-agency-warn...
Yes. Linux needs Rust to help prevent CVEs and related security problems.
Bad news: Windows has CVEs too:
https://www.opencve.io/cve?vendor=microsoft&product=windows_...
https://www.cvedetails.com/product/102217/Microsoft-Windows-...
Microsoft is adopting Rust in the Windows kernel:
https://windowsreport.com/windows-11-kernel-rust/