cve/2023/CVE-2023-6817.md

CVE-2023-6817

Description

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.

POC

Reference

• http://packetstormsecurity.com/files/177029/Kernel-Live-Patch-Security-Notice-LSN-0100-1.html
• http://www.openwall.com/lists/oss-security/2023/12/22/6

Github

• https://github.com/EGI-Federation/SVG-advisories