# CVE-2025-0033: AMD CVE-2025-0033: RMP Corruption During SNP Initialization

CVE-2025-0033 is fixed in amd64-microcode on 1 platform by DEBIAN-CVE-2025-0033 (version 3.20260923.1), released October 14, 2025. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2025-0033
- Priority: Urgent
- CVSS: 8.2 (Critical)
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: yes
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Oct 13, 2025
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-0033

## Description

<p>Microsoft is aware of <a href="http://https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3020.html">AMD-SB-3020 | CVE-2025-0033</a> disclosed by AMD on October 13, 2025.</p> <p>CVE-2025-0033 is a vulnerability in AMD EPYC processors using Secure Encrypted Virtualization – Secure Nested Paging (SEV-SNP). It involves a race condition during Reverse Map Table (RMP) initialization that could allow a malicious or compromised hypervisor to modify RMP entries before they are locked, potentially impacting the integrity of SEV-SNP guest memory. This issue does not expose plaintext data or secrets and requires privileged control of the hypervisor to exploit.</p> <p>Across Azure Confidential Computing products, multiple security guardrails are in place to prevent host compromise, combining isolation, integrity verification and continuous monitoring. All host operations follow audited and approved management pathways, with administrative access strictly controlled, limited and logged. Together, these protections reduce the risk of host compromise or unauthorized memory manipulation, helping ensure that confidential workloads and customer VMs maintain their confidentiality and integrity on Azure hosts.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | amd64-microcode Debian 14 | 3.20260923.1 | [DEBIAN-CVE-2025-0033](https://patchblox.com/security/data/fix/linux/debian-cve-2025-0033.md) | Oct 14, 2025 |

---

Data as of 2026-11-10T07:50:38Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.