Security Alert: less Version 590 Update

Understanding the changelog of software packages is crucial for maintaining the security and stability of your systems. Today, we focus on the recent critical update for less, a popular text file browser used widely across Linux distributions, including AlmaLinux. This particular update, tagged as version 590-3.el9_3, addresses a significant security vulnerability that users must promptly amend.

The update for less version 590 includes a crucial security patch which resolves an issue identified by CVE-2022-48624. The vulnerability stemmed from the improper handling of shell metacharacters in the LESSCLOSE environment variable. Exploiting this issue could allow an attacker to execute arbitrary commands on the system using the privileges of the user running less. This sort of vulnerability is particularly acute in multi-user environments where terminal access is shared amongst various users..

The efficiency of less does not usually require reading the entire input file when launching, which provides a speed advantage over some other text viewing tools. However, this efficient design must also be accompanied by stringent security measures, especially in handling input that involves commands or scripts. The patch in version 590-3.el9_3 ensures that shell metacharacters are now properly quoted, preventing potential command injection attacks.

Updating your system to incorporate the latest patches is critical. By integrating these changes, you mitigate the risks posed by known vulnerabilities, safeguarding your data and the integrity of your system. For those operating under regulatory compliance, staying updated is not just best practice but a requirement.

At LinuxPatch, we are committed to keeping your systems secure and up-to-date. For detailed instructions on how to implement this and other updates, visit our comprehensive guide at

Remember, security is a continuous process. Regularly updating your software, reviewing system logs, and educating users are all part of an effective security strategy. Stay informed, stay secure, and keep your systems in check with timely and critical updates like less 590-3.el9_3.

Keep an eye on our updates and manage your system's security with diligence. The information from changelogs not only informs you about what has changed but also empowers you to take proactive steps in managing system vulnerabilities.