---
id: CVE-2025-37823
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too

  Similarly to the previous patch, we need to safe guard hfsc_dequeue()
  too
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too

  Similarly to the previous patch, we need to safe guard hfsc_dequeue()
  too. But for this one, we don't have a…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-416
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 2.6.13, < 5.4.293'
  - 'linux_kernel >= 5.5, < 5.10.237'
  - 'linux_kernel >= 5.11, < 5.15.181'
  - 'linux_kernel >= 5.16, < 6.1.136'
  - 'linux_kernel >= 6.2, < 6.6.89'
  - 'linux_kernel >= 6.7, < 6.12.26'
  - 'linux_kernel >= 6.13, < 6.14.5'
  - linux_kernel = 2.6.12
  - linux_kernel = 6.15
  - debian_linux = 11.0
patched:
  - linux_kernel 6.14.5
published: '2025-05-08'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T22:18:19.083'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-37823'
references:
  - url: 'https://git.kernel.org/stable/c/11bccb054c1462fb069219f8e98e97a5a730758e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2f46d14919c39528c6e540ebc43f90055993eedc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/68f256305ceb426d545a0dc31f83c2ab1d211a1e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6ccbda44e2cc3d26fd22af54c650d6d5d801addf'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/76c4c22c2437d3d3880efc0f62eca06ef078d290'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c6936266f8bf98a53f28ef9a820e6a501e946d09'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c6f035044104c6ff656f4565cd22938dc892528c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/da7936518996d290e2fcfcaf6cd7e15bfd87804a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
  - cve.org
epss: 0.00229
epssPercentile: 0.13576
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-15T21:45:30.457885Z'
ingestedAt: '2026-10-15T22:48:25.480Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

net_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too

Similarly to the previous patch, we need to safe guard hfsc_dequeue()
too. But for this one, we don't have a reliable reproducer.

## Affected

- `linux_kernel >= 2.6.13, < 5.4.293`
- `linux_kernel >= 5.5, < 5.10.237`
- `linux_kernel >= 5.11, < 5.15.181`
- `linux_kernel >= 5.16, < 6.1.136`
- `linux_kernel >= 6.2, < 6.6.89`
- `linux_kernel >= 6.7, < 6.12.26`
- `linux_kernel >= 6.13, < 6.14.5`
- `linux_kernel = 2.6.12`
- `linux_kernel = 6.15`
- `debian_linux = 11.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.14.5`