CVE-2021-26392 : Vulnerability Insights and Analysis

A deep dive into CVE-2021-26392, a vulnerability affecting AMD Radeon RX 5000 Series & PRO W5000 Series as well as AMD Radeon RX 6000 Series & PRO W6000 Series.

Understanding CVE-2021-26392

This section explores the nature and impact of CVE-2021-26392.

What is CVE-2021-26392?

The vulnerability involves insufficient verification of missing size check in 'LoadModule,' potentially leading to an out-of-bounds write. This could enable an attacker with privileges to execute code on the OS/kernel by loading a malicious TA.

The Impact of CVE-2021-26392

The impact of this CVE is significant as it could allow attackers to gain unauthorized code execution privileges, posing a serious threat to system security.

Technical Details of CVE-2021-26392

Delving deeper into the technical aspects of CVE-2021-26392.

Vulnerability Description

The vulnerability arises from a lack of proper verification in 'LoadModule,' creating an avenue for an out-of-bounds write exploit that can be leveraged by malicious actors.

Affected Systems and Versions

AMD Radeon RX 5000 Series & PRO W5000 Series, including versions less than 22.5.2 of AMD Radeon Software and other related software, are affected. Similarly, AMD Radeon RX 6000 Series & PRO W6000 Series with versions less than 22.5.2 are also vulnerable.

Exploitation Mechanism

The vulnerability can be exploited by an attacker with privileges to load a malicious TA through 'LoadModule,' triggering the out-of-bounds write and potentially gaining code execution privileges.

Mitigation and Prevention

Best practices to mitigate and prevent exploitation of CVE-2021-26392.

Immediate Steps to Take

Users are advised to update affected systems and software to versions that contain patches for CVE-2021-26392. Additionally, restrict privileged access to mitigate the risk of unauthorized code execution.

Long-Term Security Practices

Regular security audits and training for system administrators can help in maintaining a strong security posture and prevent similar vulnerabilities from being exploited in the future.

Patching and Updates

Organizations should prioritize applying security patches released by AMD for the impacted product lines to eliminate the vulnerability and enhance system security.