CVE-2026-43454
Analyzed Analyzed - Analysis Complete
Linux Kernel Netfilter Duplicate Device Registration Vulnerability

Publication date: 2026-05-08

Last updated on: 2026-05-20

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: Fix for duplicate device in netdev hooks When handling NETDEV_REGISTER notification, duplicate device registration must be avoided since the device may have been added by nft_netdev_hook_alloc() already when creating the hook.
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Meta Information
Published
2026-05-08
Last Modified
2026-05-20
Generated
2026-06-19
AI Q&A
2026-05-08
EPSS Evaluated
2026-06-18
NVD
CVE-2026-43454
EUVD
EUVD-2026-28760
Affected Vendors & Products
Showing 5 associated CPEs
Vendor Product Version / Range
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel 7.0
linux linux_kernel From 6.19 (inc) to 6.19.9 (exc)
linux linux_kernel From 6.16 (inc) to 6.18.19 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability in the Linux kernel relates to the netfilter subsystem, specifically the nf_tables component. It involves a problem where a device could be registered more than once during the handling of NETDEV_REGISTER notifications. This happens because the device might have already been added by the nft_netdev_hook_alloc() function when creating the hook, leading to duplicate device registration.

Impact Analysis

Duplicate device registration in the netfilter hooks could potentially cause unexpected behavior in the network filtering functionality of the Linux kernel. This might lead to instability or errors in network packet processing, which could affect system reliability or security.

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