CVE-2020-28097 : Vulnerability Insights and Analysis

The vgacon subsystem in the Linux kernel before 5.8.10 mishandles software scrollback, leading to an out-of-bounds read vulnerability.

Understanding CVE-2020-28097

This CVE identifies a specific vulnerability in the Linux kernel related to the vgacon subsystem.

What is CVE-2020-28097?

The vulnerability in the vgacon subsystem of the Linux kernel before version 5.8.10 allows for an out-of-bounds read, known as CID-973c096f6a85.

The Impact of CVE-2020-28097

The vulnerability could be exploited by an attacker to read sensitive kernel memory, potentially leading to information disclosure or further attacks.

Technical Details of CVE-2020-28097

This section delves into the technical aspects of the CVE.

Vulnerability Description

The issue arises from the mishandling of software scrollback in the vgacon subsystem, resulting in the out-of-bounds read vulnerability.

Affected Systems and Versions

The Linux kernel versions before 5.8.10 are affected by this vulnerability.

Exploitation Mechanism

An attacker could exploit this vulnerability to read kernel memory beyond the intended boundaries, potentially accessing sensitive information.

Mitigation and Prevention

Protecting systems from CVE-2020-28097 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update the Linux kernel to version 5.8.10 or newer to mitigate the vulnerability.
Monitor for any unusual system behavior that could indicate exploitation.

Long-Term Security Practices

Regularly update the kernel and other software components to patch known vulnerabilities.
Implement least privilege access controls to limit the impact of potential breaches.
Conduct regular security assessments and audits to identify and address security weaknesses.

Patching and Updates

Stay informed about security advisories and promptly apply patches released by the Linux kernel maintainers.