---
id: CVE-2022-4269
title: A flaw was found in the Linux kernel Traffic Control (TC) subsystem
summary: >-
  A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a
  specific networking configuration (redirecting egress packets to ingress using
  TC action "mirred") a local unprivileged user could trigger a CPU soft lockup
  (AB…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-833
vendor: linux
product: linux_kernel
affected:
  - linux_kernel = 4.1
published: '2022-12-05'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T14:17:28.530'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-4269'
references:
  - url: 'https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html'
    label: secalert@redhat.com
  - url: >-
      https://lore.kernel.org/netdev/33dc43f587ec1388ba456b4915c75f02a8aae226.1663945716.git.dcaratti%40redhat.com/
    label: secalert@redhat.com
  - url: 'https://security.netapp.com/advisory/ntap-20230929-0001/'
    label: secalert@redhat.com
  - url: 'https://www.debian.org/security/2023/dsa-5480'
    label: secalert@redhat.com
  - url: 'https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lore.kernel.org/netdev/33dc43f587ec1388ba456b4915c75f02a8aae226.1663945716.git.dcaratti%40redhat.com/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://security.netapp.com/advisory/ntap-20230929-0001/'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.debian.org/security/2023/dsa-5480'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-794697.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00201
epssPercentile: 0.09934
ingestedAt: '2026-10-14T15:36:13.927Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2025-04-14T15:20:55.720146Z'
---

## Overview

A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking configuration (redirecting egress packets to ingress using TC action "mirred") a local unprivileged user could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use (TCP or SCTP) does a retransmission, resulting in a denial of service condition.

## Affected

- `linux_kernel = 4.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.