A use-after-free vulnerability in the Linux kernel's netfilter: nf tables component can be exploited to achieve local privilege escalation. The function `nft pipapo walk` did not skip inactive elements during set walk, which could lead to double deactivations of PIPAPO (Pile Packet Policies) elements, leading to use-after-free. This issue may allow an attacker to impact the confidentiality, integrity, and availability of protected information and elevate their privileges in the system.