DeFi Smart Contract Vulnerabilities Audit Guide

Here are three specific DeFi smart contract vulnerabilities suitable for inclusion in a professional audit report. Each entry includes the vulnerability type, technical mechanism, impact, and remediation strategy, formatted to meet industry standards (e.g., SWC Registry or OWASP Smart Contract Top 10 references).

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1. Reentrancy Vulnerability in Reward Distribution

Vulnerability ID: SWC-107 / Reentrancy

Severity: High

Affected Function: claimRewards(address _user)

Technical Description

The claimRewards function allows a user to claim accrued staking rewards. The implementation uses the Checks-Effects-Interactions (CEI) anti-pattern incorrectly: it updates the user’s pending reward variable after making an external call to transfer tokens.

solidity
// Vulnerable Code Snippet
function claimRewards(address _user) external {
    uint

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