CVE-2026-43024

Local service interruption via immediate NF_QUEUE verdict

Published May 1, 2026 · Updated May 1, 2026

Improper verdict validation in Linux Kernel nf_tables allows local users to interrupt service via an immediate NF_QUEUE ARP rule. The nft_verdict_init function accepts an immediate NF_QUEUE code without verifying that the selected protocol family supports queueing; the ARP family does not. Low-privilege local access and permission to submit nftables rules are required, and matching traffic can disrupt system availability.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper verdict validation in Linux Kernel nf_tables allows local users to interrupt service via an immediate NF_QUEUE ARP rule. The nft_verdict_init function accepts an immediate NF_QUEUE code without verifying that the selected protocol family supports queueing; the ARP family does not. Low-privilege local access and permission to submit nftables rules are required, and matching traffic can disrupt system availability.

The record

CVE
CVE-2026-43024
Published
May 1, 2026
Updated
May 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2026CVE publishedPublication date reported by the CVE source.
  2. May 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4e66422f1b56149761dc76030e6345d1cca6f869
  2. Affected versionversion=55a60251fa50d4e68175e36666b536a602ce4f6c <2f7f825a548be55420f0f5f716f6c27b9d312d3f
  3. Affected versionversion=6653118b176a00915125521c6572ae8e507621db <4b12a3cc3f075e750cc3c5e693fd25fb400af4a2
  4. Affected versionversion=6.8
  5. Affected versionversion=8365e9d92b85fda975a5ece7a3a139cb964018c8
  6. Affected versionversion=8e34430e33b8a80bc014f3efe29cac76bc30a4b4 <68390437a998c3f2c57212b413abef5e6d657d88
  7. Affected versionversion=960cf4f812530f01f6acc6878ceaa5404c06af7b <f140593901724cfbd16597c3a4fcb24a58ae44b0
  8. Affected versionversion=f05a497e7bc8851eeeb3a58da180ba469efebb05
  9. Affected versionversion=f342de4e2f33e0e39165d8639387aa6c19dff660 <17dc5d5a935c771338430cbc156a16a51cfd31e8
  10. Affected versionversion=f342de4e2f33e0e39165d8639387aa6c19dff660 <42a47f4b1b7695026ab9bc1bb35d4622b0835c95
  11. Affected versionversion=f342de4e2f33e0e39165d8639387aa6c19dff660 <da107398cbd4bbdb6bffecb2ce86d5c9384f4cec
  12. Affected versionversion=f342de4e2f33e0e39165d8639387aa6c19dff660 <f710691be163ae6b39e4bcab9e5be32d329f035b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4e66422f1b56149761dc76030e6345d1cca6f869; version=55a60251fa50d4e68175e36666b536a602ce4f6c <2f7f825a548be55420f0f5f716f6c27b9d312d3f; version=6653118b176a00915125521c6572ae8e507621db <4b12a3cc3f075e750cc3c5e693fd25fb400af4a2; version=6.8; version=8365e9d92b85fda975a5ece7a3a139cb964018c8; version=8e34430e33b8a80bc014f3efe29cac76bc30a4b4 <68390437a998c3f2c57212b413abef5e6d657d88; version=960cf4f812530f01f6acc6878ceaa5404c06af7b <f140593901724cfbd16597c3a4fcb24a58ae44b0; version=f05a497e7bc8851eeeb3a58da180ba469efebb05; version=f342de4e2f33e0e39165d8639387aa6c19dff660 <17dc5d5a935c771338430cbc156a16a51cfd31e8; version=f342de4e2f33e0e39165d8639387aa6c19dff660 <42a47f4b1b7695026ab9bc1bb35d4622b0835c95; version=f342de4e2f33e0e39165d8639387aa6c19dff660 <da107398cbd4bbdb6bffecb2ce86d5c9384f4cec; version=f342de4e2f33e0e39165d8639387aa6c19dff660 <f710691be163ae6b39e4bcab9e5be32d329f035b

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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