CVE-2023-6817 : LINUX KERNEL UP TO 6.6.X NFT_SET_PIPAPO.C NFT_PIPAPO_WALK USE AFTER FREE

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.

References

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=317eb9685095678f2c9f5a8189de698c5354316a

https://kernel.dance/317eb9685095678f2c9f5a8189de698c5354316a

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