---
id: CVE-2023-0590
title: >-
  A use-after-free flaw was found in qdisc_graft in net/sched/sch_api.c in the
  Linux Kernel due to a race problem
summary: >-
  A use-after-free flaw was found in qdisc_graft in net/sched/sch_api.c in the
  Linux Kernel due to a race problem. This flaw leads to a denial of service
  issue. If patch ebda44da44f6 ("net: sched: fix race condition in
  qdisc_graft()") not …
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-416
  - CWE-416
vendor: linux
product: linux_kernel
affected:
  - linux_kernel < 6.1
  - linux_kernel = 6.1
patched:
  - linux_kernel 6.1
published: '2023-03-23'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T21:17:14.087'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-0590'
references:
  - url: 'https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html'
    label: secalert@redhat.com
  - url: >-
      https://lore.kernel.org/all/20221018203258.2793282-1-edumazet%40google.com/
    label: secalert@redhat.com
  - url: 'https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: >-
      https://lore.kernel.org/all/20221018203258.2793282-1-edumazet%40google.com/
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-769027.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-794697.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-806742.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
epss: 0.00198
epssPercentile: 0.08956
ingestedAt: '2026-10-14T21:57:04.731Z'
---

## Overview

A use-after-free flaw was found in qdisc_graft in net/sched/sch_api.c in the Linux Kernel due to a race problem. This flaw leads to a denial of service issue. If patch ebda44da44f6 ("net: sched: fix race condition in qdisc_graft()") not applied yet, then kernel could be affected.

## Affected

- `linux_kernel < 6.1`
- `linux_kernel = 6.1`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.1`