---
id: 5085
title: "Attack arithmetic: how an integer overflow in PostgreSQL libpq leads to denial of service"
source_domain: swarm.ptsecurity.com
source_url: "https://swarm.ptsecurity.com/attack-arithmetic-how-an-integer-overflow-in-postgresql-libpq-leads-to-denial-of-service/"
published_at: "2026-03-10T14:00:22Z"
tags: ["cloud", "memory-safety", "denial-of-service", "postgresql", "integer-overflow", "libpq"]
phying_url: "https://phying.com/item/5085"
lang: en
---

# Attack arithmetic: how an integer overflow in PostgreSQL libpq leads to denial of service

## Summary

An integer overflow in PostgreSQL libpq's PQescapeInternal() makes it allocate too little and write hundreds of MB past the buffer, segfaulting applications — a denial-of-service vulnerability.

## Intelligence Metadata

- **Sources:** swarm.ptsecurity.com
- **Published:** 2026-03-10T14:00:22Z
- **Original:** https://swarm.ptsecurity.com/attack-arithmetic-how-an-integer-overflow-in-postgresql-libpq-leads-to-denial-of-service/
- **Phying News:** https://phying.com/item/5085