---
id: 1068
title: "Zen and the Art of Microcode Hacking"
source_domain: bughunters.google.com
source_url: "https://bughunters.google.com/blog/zen-and-the-art-of-microcode-hacking"
published_at: "2025-03-05 00:00"
tags: ["vulnerability", "amd", "zen", "microcode", "entrysign", "cpu-security"]
phying_url: "https://phying.com/item/1068"
lang: en
---

# Zen and the Art of Microcode Hacking

## Summary

This blog post covers the full details of EntrySign, the AMD Zen microcode signature validation vulnerability recently discovered by the Google Security team.

## Intelligence Metadata

- **Sources:** bughunters.google.com
- **Published:** 2025-03-05 00:00
- **Original:** https://bughunters.google.com/blog/zen-and-the-art-of-microcode-hacking
- **Phying News:** https://phying.com/item/1068