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CVE-2023-6817

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Date: December 18, 2023

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.

Language: C

Severity Score

Related Resources (8)

http://www.openwall.com/lists/oss-security/2023/12/22/6
https://kernel.dance/317eb9685095678f2c9f5a8189de698c5354316a
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=317eb9685095678f2c9f5a8189de698c5354316a
http://www.openwall.com/lists/oss-security/2023/12/22/13
https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html
http://packetstormsecurity.com/files/177029/Kernel-Live-Patch-Security-Notice-LSN-0100-1.html
https://nvd.nist.gov/vuln/detail/CVE-2023-6817
https://www.mend.io/vulnerability-database/CVE-2023-6817

Severity Score

Weakness Type (CWE)

Use After Free

CWE-416

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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