Background The discovery and analysis of vulnerabilities is a critical aspect of cybersecurity research. Today, we will dive into CVE-2023-1829, a vulnerability in the cls_tcindex network traffic classifier found by Valis. We will explore the process of exploiting and examining this vulnerability, shedding light on the intricate details and potential consequences. We have thoroughly tested our exploit on Ubuntu 22.04 with kernel version 5.15.0-25, which was built from the official 5.