CVE-2018-21008 : Security Advisory and Response

A bug was found in the Linux kernel prior to version 4.16.7. The function rsi_mac80211_detach in the file drivers/net/wireless/rsi/rsi_91x_mac80211.c can lead to a use-after-free situation.

Understanding CVE-2018-21008

What is CVE-2018-21008?

An issue was discovered in the Linux kernel before version 4.16.7. A use-after-free vulnerability can be triggered by the function rsi_mac80211_detach in a specific file.

The Impact of CVE-2018-21008

This vulnerability could potentially allow an attacker to execute arbitrary code or cause a denial of service (DoS) on the affected system.

Technical Details of CVE-2018-21008

Vulnerability Description

The vulnerability arises from a use-after-free condition in the rsi_mac80211_detach function within the specified file path.

Affected Systems and Versions

Affected systems are those running Linux kernel versions prior to 4.16.7.

Exploitation Mechanism

The vulnerability can be exploited by a malicious actor to manipulate memory allocation and potentially execute unauthorized code.

Mitigation and Prevention

Immediate Steps to Take

Update the Linux kernel to version 4.16.7 or later to mitigate the vulnerability.
Monitor vendor advisories and security mailing lists for patches and updates.

Long-Term Security Practices

Regularly apply security patches and updates to all software components.
Implement strong access controls and network segmentation to limit the impact of potential attacks.

Patching and Updates

Stay informed about security alerts and advisories related to the Linux kernel and promptly apply patches to address known vulnerabilities.