CVE-2022-46781 Explained : Impact and Mitigation

An issue was discovered in the Arm Mali GPU Kernel Driver that allows a non-privileged user to access a limited amount outside of buffer bounds. This affects Valhall versions up to r41p0 and Avalon versions up to r41p0.

Understanding CVE-2022-46781

This CVE identifies a vulnerability in the Arm Mali GPU Kernel Driver, potentially leading to unauthorized memory access.

What is CVE-2022-46781?

The vulnerability in the Arm Mali GPU Kernel Driver permits a non-privileged user to conduct improper GPU memory processing operations, enabling access to a restricted amount beyond buffer bounds. The affected versions include Valhall r29p0 through r41p0 prior to r42p0 and Avalon r41p0 before r42p0.

The Impact of CVE-2022-46781

Exploitation of this vulnerability could allow unauthorized users to access restricted memory regions, potentially leading to information disclosure or further system compromise.

Technical Details of CVE-2022-46781

This section covers specific technical aspects of the vulnerability.

Vulnerability Description

The vulnerability allows a non-privileged user to execute improper GPU memory processing operations, leading to unauthorized access beyond buffer bounds.

Affected Systems and Versions

The Arm Mali GPU Kernel Driver versions Valhall r29p0 through r41p0 and Avalon r41p0 are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging the improper GPU memory processing operations available to non-privileged users.

Mitigation and Prevention

Here are the recommended steps to mitigate the risk posed by CVE-2022-46781.

Immediate Steps to Take

Update to Arm Mali GPU Kernel Driver version r42p0 or higher to patch the vulnerability.
Restrict non-privileged user access to sensitive system resources to minimize the impact of unauthorized memory access.

Long-Term Security Practices

Regularly monitor and audit GPU memory processing operations to detect any abnormal activities.
Educate users on safe computing practices to prevent unauthorized access attempts.

Patching and Updates

Stay informed about security advisories from Arm regarding the Mali GPU Kernel Driver to promptly apply patches and updates.