CVE-2023-6817: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

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 double deactivations of PIPAPO (Pile Packet Policies) elements, leading to use-after-free. We recommend upgrading past commit 317eb9685095678f2c9f5a8189de698c5354316a.

Affected products

• Linux Linux Kernel: from 5.6, before 5.10.204 (fixed in 5.10.204); from 5.11, before 5.15.143 (fixed in 5.15.143); from 5.16, before 6.1.68 (fixed in 6.1.68); from 6.2, before 6.6.7 (fixed in 6.6.7); version 6.7 only

Published 2023-12-18. Last modified 2026-06-17.