CVE-2023-6817

Use-after-free in Linux kernel's netfilter: nf_tables component

HIGH
7.8
CVSS Score
Published: December 18, 2023 at 02:37 PM UTC
Updated: October 14, 2026 at 11:17 PM UTC
5 products affected across 2 vendorsLinux KernelSIMATIC S7-1500 CPU 1518-4 Pn /dp MFP FirmwareSiplus S7-1500 CPU 1518-4 Pn /dp MFP Firmware

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Severity
HIGH7.8
Exploit prediction
EPSS 0.3%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

5.11 ≤ v < 5.15.1435.16 ≤ v < 6.1.685.6 ≤ v < 5.10.2046.2 ≤ v < 6.6.75.66.76.7 rc16.7 rc26.7 rc36.7 rc4
Affected range stops below 5.10.204, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.15.143, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.1.68, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.6.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.7, so it looks safe — our inference, not a vendor statement
V3.1.0 ≤ v < V3.1.53.1.0
Affected range stops below V3.1.5, so it looks safe — our inference, not a vendor statement
V3.1.0 ≤ v < V3.1.53.1.0
Affected range stops below V3.1.5, so it looks safe — our inference, not a vendor statement
V3.1.0 ≤ v < V3.1.53.1.0
Affected range stops below V3.1.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

7.8HIGHGoogle
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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