CVE-2023-51780 : What You Need to Know

An issue was discovered in the Linux kernel before 6.6.8, specifically in the do_vcc_ioctl function in net/atm/ioctl.c. This vulnerability is due to a use-after-free flaw caused by a vcc_recvmsg race condition.

Understanding CVE-2023-51780

This section provides insights into the impact and technical details of CVE-2023-51780.

What is CVE-2023-51780?

The CVE-2023-51780 vulnerability exists in the Linux kernel before version 6.6.8, allowing attackers to trigger a use-after-free condition via the do_vcc_ioctl function in net/atm/ioctl.c.

The Impact of CVE-2023-51780

This vulnerability could be exploited by malicious actors to execute arbitrary code or cause a denial of service (DoS) condition on affected systems.

Technical Details of CVE-2023-51780

Let's delve deeper into the technical aspects of CVE-2023-51780.

Vulnerability Description

The issue stems from a race condition in the vcc_recvmsg function, leading to a use-after-free scenario in the do_vcc_ioctl function in net/atm/ioctl.c.

Affected Systems and Versions

All Linux kernel versions before 6.6.8 are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the vcc_recvmsg race condition to trigger the use-after-free flaw.

Mitigation and Prevention

Here are the recommended steps to mitigate and prevent exploitation of CVE-2023-51780.

Immediate Steps to Take

Update the Linux kernel to version 6.6.8 or later to patch the vulnerability.
Monitor for any unusual system behavior that could indicate a compromise.

Long-Term Security Practices

Regularly update and patch all software components to prevent known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential intrusions.

Patching and Updates

Ensure timely application of security updates and patches provided by the Linux kernel maintainers.