CVE-2023-6817

CVSS 3.1 Score 7.8 of 10 (high)

Details

Published Dec 18, 2023
Updated: Feb 8, 2024
CWE ID 416

Summary

CVE-2023-6817 is a use-after-free vulnerability affecting the Linux kernel's netfilter: nf_tables component. This issue allows local privilege escalation to occur due to a flaw in the nft_pipapo_walk function. The function fails to skip inactive elements during set walk, resulting in double deactivations of PIPAPO (Pile Packet Policies) elements. Consequently, these elements become free for use, leading to use-after-free vulnerabilities. It is recommended to upgrade the Linux kernel to a version past commit 317eb9685095678f2c9f5a8189de698c5354316a to mitigate this risk.

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