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CVE-2026-43024

5.5 · 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_QUEU…

Published May 1, 2026EPSS 0.17%

Overview

CVE-2026-43024 is a medium-severity vulnerability. It was published on May 1, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/17dc5d5a935c771338430cbc156a16a51cfd31e8Refgit.kernel.org/stable/c/2f7f825a548be55420f0f5f716f6c27b9d312d3fRefgit.kernel.org/stable/c/42a47f4b1b7695026ab9bc1bb35d4622b0835c95Refgit.kernel.org/stable/c/4b12a3cc3f075e750cc3c5e693fd25fb400af4a2Refgit.kernel.org/stable/c/68390437a998c3f2c57212b413abef5e6d657d88Refgit.kernel.org/stable/c/da107398cbd4bbdb6bffecb2ce86d5c9384f4cecRefgit.kernel.org/stable/c/f140593901724cfbd16597c3a4fcb24a58ae44b0Refgit.kernel.org/stable/c/f710691be163ae6b39e4bcab9e5be32d329f035bRefcert-portal.siemens.com/productcert/html/ssa-019113.htmlRefcert-portal.siemens.com/productcert/html/ssa-082556.html

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43024?

CVE-2026-43024 is a medium-severity vulnerability. It was published on May 1, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-43024?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-43024?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-43024?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43024 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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