CVE-2025-29939
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Improper Access Control in AMD SEV Enables Guest Memory Compromise

Publication date: 2026-02-10

Last updated on: 2026-02-10

Assigner: Advanced Micro Devices Inc.

Description
Improper access control in secure encrypted virtualization (SEV) could allow a privileged attacker to write to the reverse map page (RMP) during secure nested paging (SNP) initialization, potentially resulting in a loss of guest memory confidentiality and integrity.

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Meta Information

Published
2026-02-10
Last Modified
2026-02-10
Generated
2026-07-07
AI Q&A
2026-02-10
EPSS Evaluated
2026-07-05
NVD
CVE-2025-29939
EUVD
EUVD-2025-207140

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
amd secure_encrypted_virtualization *

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

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Executive Summary

This vulnerability involves improper access control in AMD's secure encrypted virtualization (SEV) technology. Specifically, a privileged attacker could write to the reverse map page (RMP) during the initialization of secure nested paging (SNP). This flaw could compromise the security mechanisms designed to protect guest memory.

Impact Analysis

The impact of this vulnerability is a potential loss of guest memory confidentiality and integrity. This means that an attacker with sufficient privileges could manipulate or access sensitive data within the virtualized environment, undermining the security guarantees of SEV and potentially leading to data breaches or unauthorized data modification.

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