CVE-2026-43024

MEDIUM

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: reject immediate NF_QUEUE verdict nft_queue is always used from userspace nftables to deliver the NF_QUEUE verdict. Immediately emitting an NF_QUEUE verdict is never used by the userspace nft tools, so reject immediate NF_QUEUE verdicts. The arp family does not provide queue support, but such an immediate verdict is still reachable. Globally reject NF_QUEUE immediate verdicts to address this issue.

CVSS v3.1 Score

5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Published: 5/1/2026Modified: 7/14/2026

Related Intelligence (1)

CRITICALAi

Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP

<p><a href="https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-209-04.json"><strong>View CSAF</strong></a></p> <h2>Summary</h2> <p><strong>Multiple vulnerabilities have been identified in the additional GNU/Linux subsystem of the firmware version V3.1.6 for the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP (incl. SIPLUS variant). Siemens is preparing fix versions and recommend

CVE-2021-41617CVE-2023-28531
CISA Advisories

References (10)

https://git.kernel.org/stable/c/17dc5d5a935c771338430cbc156a16a51cfd31e8Patchhttps://git.kernel.org/stable/c/2f7f825a548be55420f0f5f716f6c27b9d312d3fPatchhttps://git.kernel.org/stable/c/42a47f4b1b7695026ab9bc1bb35d4622b0835c95Patchhttps://git.kernel.org/stable/c/4b12a3cc3f075e750cc3c5e693fd25fb400af4a2Patchhttps://git.kernel.org/stable/c/68390437a998c3f2c57212b413abef5e6d657d88Patchhttps://git.kernel.org/stable/c/da107398cbd4bbdb6bffecb2ce86d5c9384f4cecPatchhttps://git.kernel.org/stable/c/f140593901724cfbd16597c3a4fcb24a58ae44b0Patchhttps://git.kernel.org/stable/c/f710691be163ae6b39e4bcab9e5be32d329f035bPatchhttps://cert-portal.siemens.com/productcert/html/ssa-019113.htmlhttps://cert-portal.siemens.com/productcert/html/ssa-082556.html