As a very relevant example, Chrome found that 70% of their serious security bugs were memory safety bugs. 36% of them were use-after-free.

https://www.zdnet.com/article/chrome-70-of-all-security-bugs...

The developer of curl has done an analysis of what percent of his CVEs would have been avoided in a memory safe language. I think the answer was a bare majority.

It's been discussed at length multiple times. This should be enough to get you started on further research:

https://msrc.microsoft.com/blog/2019/07/a-proactive-approach...

> ~70% of the vulnerabilities Microsoft assigns a CVE each year continue to be memory safety issues