Roughly 70% of all serious security bugs in the Chrome codebase are memory management and safety bugs, Google engineers said. From a report: Half of the 70% are use-after-free vulnerabilities, a type of security issue that arises from incorrect management of memory pointers (addresses), leaving doors open for attackers to attack Chrome’s inner components. The percentage was compiled after Google engineers analyzed 912 security bugs fixed in the Chrome stable branch since 2015, bugs that had a “high” or “critical” severity rating. The number is identical to stats shared by Microsoft. Speaking at a security conference in February 2019, Microsoft engineers said that for the past 12 years, around 70% of all security updates for Microsoft products addressed memory safety vulnerabilities.