CVE-2026-43024

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.

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

EPSS — Exploit Prediction

0.0001

Probability of exploitation

0.02%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.19.307 — 4.20
linux	linux_kernel	5.4.269 — 5.5
linux	linux_kernel	5.10.210 — 5.10.253
linux	linux_kernel	5.15.149 — 5.15.203
linux	linux_kernel	6.1.76 — 6.1.168
linux	linux_kernel	6.6.15 — 6.6.134
linux	linux_kernel	6.7.3 — 6.8
linux	linux_kernel	6.8.1 — 6.12.81
linux	linux_kernel	6.13 — 6.18.22
linux	linux_kernel	6.19 — 6.19.12
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/17dc5d5a935c771338430cbc156a16a51cfd31e8 https://git.kernel.org/stable/c/2f7f825a548be55420f0f5f716f6c27b9d312d3f https://git.kernel.org/stable/c/42a47f4b1b7695026ab9bc1bb35d4622b0835c95 https://git.kernel.org/stable/c/4b12a3cc3f075e750cc3c5e693fd25fb400af4a2 https://git.kernel.org/stable/c/68390437a998c3f2c57212b413abef5e6d657d88 https://git.kernel.org/stable/c/da107398cbd4bbdb6bffecb2ce86d5c9384f4cec https://git.kernel.org/stable/c/f140593901724cfbd16597c3a4fcb24a58ae44b0 https://git.kernel.org/stable/c/f710691be163ae6b39e4bcab9e5be32d329f035b

Frequently Asked Questions

What is CVE-2026-43024? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-43024? +

CVE-2026-43024 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0001, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-43024? +

CVE-2026-43024 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-43024? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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