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Linux KernelOperating system · Linux

CVE-2026-43024

MEDIUM · 5.5 CVSS v3.1 Published 2026-05-01
Fix available
A fix is available. Upgrade to 4.20 / 5.5 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 4.19.307, < 4.20>= 5.4.269, < 5.5>= 5.10.210, < 5.10.253>= 5.15.149, < 5.15.203>= 6.1.76, < 6.1.168>= 6.6.15, < 6.6.134>= 6.7.3, < 6.8>= 6.8.1, < 6.12.81>= 6.13, < 6.18.22>= 6.19, < 6.19.12= 6.8= 7.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 4.20 / 5.5 / 5.10.253 or later
Fixed in 4.205.55.10.253
Vendor patch git.kernel.org →
Recommended fix High confidence

Upgrade to kernel 4.20 or later (for 4.19.x), 5.5 or later (for 5.4.x), 5.10.253 or later (for 5.10.x), or 5.15.203 or later (for 5.15.x). Prefer the latest stable release in your respective branch.

  1. 1. Identify the currently running kernel version using `uname -r`
  2. 2. Based on the current version, determine the minimum fixed version: for 4.19.x series upgrade to 4.20+, for 5.4.x upgrade to 5.5+, for 5.10.x upgrade to 5.10.253+, for 5.15.x upgrade to 5.15.203+
  3. 3. Update the system package repository to fetch available kernel packages
  4. 4. Install the new kernel package using the system package manager (e.g., `apt-get update && apt-get install linux-image-<version>` for Debian/Ubuntu, or `yum update kernel` for RHEL/CentOS)
  5. 5. Reboot the system to load the new kernel using `reboot`
  6. 6. Verify the new kernel is running with `uname -r` and confirm the version includes the fix
Caveat Kernel upgrades may require rebuild of out-of-tree kernel modules; ensure compatible drivers/modules are available before upgrading.

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-43024 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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