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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-43451 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: fix entry leak in bridge verdict error path nfqnl_recv_verdict() calls find_dequeue_entry() to remove the queue entry from the queue data structures, taking ownership of the entry. For PF_BRIDGE packets, it then calls nfqa_parse_bridge() to parse VLAN attributes. If nfqa_parse_bridge() returns an error (e.g. NFQA_VLAN present but NFQA_VLAN_TCI missing), the function returns immediately without freeing the dequeued entry or its sk_buff. This leaks the nf_queue_entry, its associated sk_buff, and all held references (net_device refcounts, struct net refcount). Repeated triggering exhausts kernel memory. Fix this by dropping the entry via nfqnl_reinject() with NF_DROP verdict on the error path, consistent with other error handling in this file.


Metrics

 
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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/0b18d1b834ab5a5009be70b530f978d7989e445b kernel.org Patch 
https://git.kernel.org/stable/c/208669df703a25a601f45822b10c413f258bf275 kernel.org Patch 
https://git.kernel.org/stable/c/47b1c5d1b0944aa88299f55a846fabaefc756982 kernel.org Patch 
https://git.kernel.org/stable/c/9853d94b82d303fc4ac37d592a23a154096ecd41 kernel.org Patch 
https://git.kernel.org/stable/c/a907bea273b60d3e604ec4e8e1f6c49954805794 kernel.org Patch 
https://git.kernel.org/stable/c/b38d2b4603fd3dda24eb8b3dd81c18a0930be97b kernel.org Patch 
https://git.kernel.org/stable/c/cf4a4df38d1747e06fc54f9879bd7a6f4178032f kernel.org Patch 
https://git.kernel.org/stable/c/f1ba83755d81c6fc66ac7acd723d238f974091e9 kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-401 Missing Release of Memory after Effective Lifetime cwe source acceptance level NIST  

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-43451
NVD Published Date:
05/08/2026
NVD Last Modified:
05/21/2026
Source:
kernel.org