It's even worse. The majority, not of all bugs, but all vulnerabilities (of all severities) do come from memory safety bugs. TFA: "For more than a decade, memory safety vulnerabilities have consistently represented more than 65% of vulnerabilities across products, and across the industry."

On top of that, memory safety vulnerabilities are disproportionately high severity: "Memory safety vulnerabilities disproportionately represent our most severe vulnerabilities. In 2022, despite only representing 36% of vulnerabilities in the security bulletin (NOTE: down to 36% from 65% because of moving from C++ to Rust and other memory safe languages), memory-safety vulnerabilities accounted for 86% of our critical severity security vulnerabilities, our highest rating, and 89% of our remotely exploitable vulnerabilities. Over the past few years, memory safety vulnerabilities have accounted for 78% of confirmed exploited “in-the-wild” vulnerabilities on Android devices."