# CVE-2026-43024: netfilter: nf_tables: reject immediate NF_QUEUE verdict

> Attackers can cause a denial of service by triggering an unsupported immediate NF_QUEUE verdict in the Linux kernel netfilter subsystem.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 1 May 2026
- **Updated:** 15 Oct 2026
- **Also known as:** BELL-CVE-2026-43024, DEBIAN-CVE-2026-43024, GHSA-g9qr-gmhx-8q7c, ROOT-OS-DEBIAN-11-CVE-2026-43024, ROOT-OS-UBUNTU-2204-CVE-2026-43024, ROOT-OS-UBUNTU-2404-CVE-2026-43024, UBUNTU-CVE-2026-43024

## What is CVE-2026-43024?

CVE-2026-43024 is a medium-severity denial of service vulnerability in Linux kernel, published on 1 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official 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.

## Which versions are affected by CVE-2026-43024?

It affects 1 product.


Products: Linux kernel.

## How do I fix CVE-2026-43024?

Apply the vendor's patch.

## Is CVE-2026-43024 being exploited?

There is no known exploitation of CVE-2026-43024 in the wild and no public exploit code.

## Other vulnerabilities in Linux kernel

- [CVE-2026-53266](https://insights.sbomify.com/CVE-2026-53266/): Linux Kernel Out-of-Bounds Write (high 8.8, exploited in the wild)
- [CVE-2013-6282](https://insights.sbomify.com/CVE-2013-6282/): Linux Kernel Improper Input Validation (high 8.8, exploited in the wild)
- [CVE-2022-0185](https://insights.sbomify.com/CVE-2022-0185/): Linux Kernel Heap-Based Buffer Overflow (high 8.4, exploited in the wild)
- [CVE-2013-2094](https://insights.sbomify.com/CVE-2013-2094/): Linux Kernel Privilege Escalation (high 8.4, exploited in the wild)
- [CVE-2026-53362](https://insights.sbomify.com/CVE-2026-53362/): Linux Kernel Unspecified (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-43024 and fix it if it is affected.

What it is: CVE-2026-43024 is a medium-severity denial of service vulnerability in Linux kernel, published on 1 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-43024 in the wild and no public exploit code.

Affected product: Linux kernel. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-43024/ (Markdown: https://insights.sbomify.com/CVE-2026-43024/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-43024
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-43024
- OSV: https://osv.dev/vulnerability/CVE-2026-43024

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-43024/
Summaries are generated and may contain mistakes; the official description above is the record.