CVE-2026-43454
netfilter: nf_tables: Fix for duplicate device in netdev hooks
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.
INFO
Published Date :
May 8, 2026, 3:16 p.m.
Last Modified :
May 20, 2026, 6:04 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Apply the netfilter patch to prevent duplicate device registration.
- Ensure netfilter hooks are correctly allocated upon device registration.
- Review netdev hook allocation logic for potential race conditions.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-43454.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-43454 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-43454
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-43454 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-43454 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
May. 20, 2026
Action Type Old Value New Value Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 6.19.9 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.16 up to (excluding) 6.18.19 Added Reference Type kernel.org: https://git.kernel.org/stable/c/2041cdb078041611510fc189410bc70b29f688fb Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6d2a95c6890577cc3eab2b20018e16850d7fb094 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/b7cdc5a97d02c943f4bdde4d5767ad0c13cad92b Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 11, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 08, 2026
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/2041cdb078041611510fc189410bc70b29f688fb Added Reference https://git.kernel.org/stable/c/6d2a95c6890577cc3eab2b20018e16850d7fb094 Added Reference https://git.kernel.org/stable/c/b7cdc5a97d02c943f4bdde4d5767ad0c13cad92b