# Integer Overflow via Unchecked Arithmetic

- ID: go-integer-overflow
- Severity: MEDIUM
- CWE: CWE-190 (CWE-190)
- Languages: Go
- Frameworks: stdlib, gin, echo, fiber, chi

## Description

User-controlled integer used in arithmetic or allocation without bounds checking.

## Detection Message

User input from {source} flows to arithmetic operation at {sink} without bounds validation.
This could cause integer overflow leading to unexpected behavior or security bypass.

## Remediation

Validate bounds before arithmetic operations with user input.

```go
count, err := strconv.Atoi(r.URL.Query().Get("count"))
if err != nil || count < 0 || count > 10000 {
    return errors.New("invalid count")
}
buffer := make([]byte, count*1024)
```

Learn more: https://shoulder.dev/learn/go/cwe-190/integer-overflow

## Documentation

[object Object]

## Related Rules

- **Integer Overflow via Unchecked Arithmetic** [MEDIUM]: 
- **Integer Overflow / Large Number Handling** [LOW]: