CVE-2026-0004
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AMD Processor Transient Execution Vulnerability

Publication date: 2026-11-12

Last updated on: 2026-11-12

Assigner: Advanced Micro Devices Inc.

Description
A transient execution vulnerability in some AMD processors may allow an attacker with the ability to execute code on the system to infer data in the L1D cache, potentially resulting in the leakage of sensitive information across privileged boundaries.

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Meta Information

Published
2026-11-12
Last Modified
2026-11-12
Generated
2026-11-12
AI Q&A
2026-11-12
EPSS Evaluated
N/A
NVD
CVE-2026-0004
EUVD
EUVD-2026-124645

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
amd epyc_8005 *
amd epyc_9005 *
amd epyc_embedded *

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

CVE-2026-0004 is a transient execution vulnerability in certain AMD processors. It allows an attacker who can execute code on a system to infer data stored in the L1D cache, which may result in sensitive information being leaked across privilege boundaries like between user and kernel space.

Detection Guidance

Detection primarily involves checking if your system uses affected AMD processors and verifying if mitigations are applied. Use system commands like 'lscpu' or 'dmidecode' to identify AMD EPYC processors. Check for firmware updates via BIOS/UEFI or OEM tools. Monitor vendor advisories for specific detection tools or commands.

Impact Analysis

This vulnerability could allow an attacker to access sensitive data that should be protected, such as passwords or encryption keys, if they gain code execution on your system. It primarily affects confidentiality by enabling data leakage from the L1D cache.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, which may violate compliance requirements under GDPR (data protection) and HIPAA (health information privacy). Organizations must apply mitigations to prevent data leakage and ensure regulatory adherence.

Mitigation Strategies

Apply AMD's Platform Initialization firmware updates or microcode mitigations for your processor series. Update OS (Linux, Windows, VMware) and contact your OEM for BIOS updates. Monitor AMD's security bulletin for new mitigation releases and ensure all systems are patched promptly.

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