What Is the Role of the Solidity Compiler in Mitigating Integer Vulnerabilities?

Since Solidity version 0.8.0, the compiler automatically includes checks for integer overflow and underflow for all arithmetic operations by default. If an operation would result in an overflow or underflow, the transaction is automatically reverted, eliminating the need for developers to use external libraries like SafeMath for basic arithmetic.

This change significantly improved the security baseline for new smart contracts by making these common vulnerabilities impossible in the default setting.