CVE-2022-3910 : What You Need to Know

This article provides detailed information about CVE-2022-3910, a Use After Free vulnerability in the Linux Kernel that allows Privilege Escalation.

Understanding CVE-2022-3910

CVE-2022-3910 is a Use After Free vulnerability in the Linux Kernel, specifically in the io_uring component, leading to Privilege Escalation.

What is CVE-2022-3910?

The vulnerability arises due to an improper update of the reference count in io_uring, allowing an attacker to exploit Use-After-Free and escalate local privileges by invoking io_msg_ring with a fixed file.

The Impact of CVE-2022-3910

This vulnerability, identified as CAPEC-233 Privilege Escalation, poses a high risk with a CVSSv3.1 base score of 7.8. It has a high impact on confidentiality, integrity, and availability.

Technical Details of CVE-2022-3910

CVE-2022-3910 is categorized as a CWE-416 Use After Free vulnerability with a CVSSv3.1 base score of 7.8.

Vulnerability Description

The vulnerability allows for Use After Free and Local Privilege Escalation by improperly handling reference counts in the io_uring component.

Affected Systems and Versions

The issue affects Linux systems running Kernel version 5.18.0 up to version 5.19.10.

Exploitation Mechanism

Exploitation involves invoking io_msg_ring with a fixed file, leading to a decrease in the reference count and subsequent privilege escalation.

Mitigation and Prevention

To mitigate the impact of CVE-2022-3910, immediate action is required to address the vulnerability.

Immediate Steps to Take

Upgrade the Linux Kernel past commit fc7222c3a9f56271fba02aabbfbae999042f1679

Long-Term Security Practices

Implement regular security updates and follow best practices for secure coding and system configuration.

Patching and Updates

Stay informed about security patches released by the Linux Kernel team and promptly apply them to all affected systems.