CVE-2021-26345 : What You Need to Know

This article provides detailed information about CVE-2021-26345, a vulnerability impacting AMD EPYC Processors.

Understanding CVE-2021-26345

CVE-2021-26345 is a vulnerability that arises due to a failure to validate the value in APCB, potentially leading to an out-of-bounds memory read.

What is CVE-2021-26345?

The vulnerability in CVE-2021-26345 may allow a privileged attacker to tamper with the APCB token, resulting in a denial of service.

The Impact of CVE-2021-26345

CVE-2021-26345 could be exploited by an attacker to cause a denial of service condition on affected systems.

Technical Details of CVE-2021-26345

CVE-2021-26345 affects various versions of 2nd, 3rd, and 4th Gen AMD EPYC Processors running on x86 platforms.

Vulnerability Description

The vulnerability stems from a lack of validation in the APCB value, which could be manipulated by a privileged attacker.

Affected Systems and Versions

2nd, 3rd, and 4th Gen AMD EPYC Processors on x86 platforms are vulnerable to CVE-2021-26345.

Exploitation Mechanism

An attacker with the ability to tamper with the APCB token could trigger an out-of-bounds memory read, leading to a potential denial of service.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-26345, immediate steps should be taken along with long-term security practices and timely patching.

Immediate Steps to Take

Organizations using affected AMD EPYC Processors should implement relevant security patches and updates to safeguard their systems.

Long-Term Security Practices

Implementing secure coding practices, routine security assessments, and employee security training can enhance overall security posture.

Patching and Updates

Regularly monitor for security advisories from AMD and promptly apply any patches or updates to address vulnerabilities.