CVE-2021-26375 : What You Need to Know

This article provides detailed information about CVE-2021-26375, a vulnerability affecting certain AMD processors.

Understanding CVE-2021-26375

This section delves into the specifics of the CVE-2021-26375 vulnerability.

What is CVE-2021-26375?

The CVE-2021-26375 vulnerability involves an Insufficient General Purpose IO (GPIO) bounds check in the System Management Unit (SMU) of AMD processors. This flaw could lead to unauthorized access or updates to an invalid address space, potentially resulting in a denial of service.

The Impact of CVE-2021-26375

The impact of this vulnerability can be severe, as it may allow malicious actors to disrupt the normal operation of affected systems, leading to denial of service incidents.

Technical Details of CVE-2021-26375

In this section, we explore the technical aspects of CVE-2021-26375 in more detail.

Vulnerability Description

The vulnerability stems from an insufficient bounds check in the GPIO functionality of the SMU within AMD processors, enabling attackers to exploit this weakness for unauthorized access.

Affected Systems and Versions

AMD processors such as EPYC™ Processors, Ryzen™ Series, and Athlon™ Series are impacted by this vulnerability across various versions.

Exploitation Mechanism

Attackers can exploit the inadequate GPIO bounds check in the SMU to perform unauthorized access or updates to an invalid address space, potentially leading to a denial of service.

Mitigation and Prevention

This section outlines measures to mitigate the risks associated with CVE-2021-26375.

Immediate Steps to Take

Users and system administrators should apply security patches and updates provided by AMD to address the vulnerability promptly. Implementing network security measures and access controls can also help mitigate the risk of exploitation.

Long-Term Security Practices

Regularly monitor security advisories from AMD and other relevant sources to stay informed about potential vulnerabilities. Conducting security assessments and audits can help identify and address security gaps proactively.

Patching and Updates

Ensure that systems running affected AMD processors are updated with the latest patches and firmware releases from AMD to mitigate the CVE-2021-26375 vulnerability effectively.