---
id: CVE-2026-98565
title: >-
  kernel: net: dsa: mt7530: fix NULL dereference on unbind of MT7531 and MT7621
  (CVE-2026-98565)
summary: >-
  A flaw was found in the Linux kernel's MediaTek MT7530 network switch driver.
  This flaw allows a local user with administrative privileges to cause a Denial
  of Service (DoS) through a kernel crash. The issue occurs during driver
  unbinding …
severity: medium
cvss: 4.4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-476
vendor: Red Hat
product: Linux
affected:
  - >-
    Linux >= ddda1ac116c852bb969541ed53cffef7255c4961 <
    bd172580e624bac00d83abd5c4320d2e14d853bc
  - >-
    Linux >= ddda1ac116c852bb969541ed53cffef7255c4961 <
    e9a5298532780ecdd05c3220f3e1e3067b3537c3
  - >-
    Linux >= ddda1ac116c852bb969541ed53cffef7255c4961 <
    62c0e38b2e5034184d4502ce77bd178b29e59b83
  - >-
    Linux >= ddda1ac116c852bb969541ed53cffef7255c4961 <
    aae2a1f1e3a0ac5eeb439262a2328a2a392413ac
  - >-
    Linux >= ddda1ac116c852bb969541ed53cffef7255c4961 <
    c2cdef41e0b4d8ed23a5b41e6ad4e64594e055e4
  - Linux 5.1
published: '2026-10-18'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T02:41:37+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98565.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98565.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98565'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2554969'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98565'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98565'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98565.mbox
  - url: 'https://git.kernel.org/stable/c/bd172580e624bac00d83abd5c4320d2e14d853bc'
  - url: 'https://git.kernel.org/stable/c/e9a5298532780ecdd05c3220f3e1e3067b3537c3'
  - url: 'https://git.kernel.org/stable/c/62c0e38b2e5034184d4502ce77bd178b29e59b83'
  - url: 'https://git.kernel.org/stable/c/aae2a1f1e3a0ac5eeb439262a2328a2a392413ac'
  - url: 'https://git.kernel.org/stable/c/c2cdef41e0b4d8ed23a5b41e6ad4e64594e055e4'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.002
epssPercentile: 0.0978
ingestedAt: '2026-10-18T15:45:12.261Z'
---

## Overview

A flaw was found in the Linux kernel's MediaTek MT7530 network switch driver. This flaw allows a local user with administrative privileges to cause a Denial of Service (DoS) through a kernel crash. The issue occurs during driver unbinding or module removal on specific hardware variants, where the kernel attempts to disable uninitialized power regulators, triggering a null pointer dereference.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98565.json)

**kernel: net: dsa: mt7530: fix NULL dereference on unbind of MT7531 and MT7621** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-20.

Not affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Refer to the advisory for fix availability.