In 2024, our research team noticed and wrote proofs of concept for a use-after-free vulnerability affecting the latest Red Hat Enterprise Linux 9 (RHEL 9). At the time, kernel version 5.14.0-503.15.1.el9_5. The vulnerability had been fixed on the Linux kernel upstream on July 17, 2023 [1][2]. After we reported it, it was backported to Red Hat Enterprise Linux 9 on March 11, 2025 [3], in the kernel version 5.14.0-503.31.1.el9_5.