---
id: CVE-2026-98564
title: >-
  kernel: net: dsa: mt7530: leave the MDIO IRQ mappings to regmap-irq
  (CVE-2026-98564)
summary: >-
  A flaw was found in the Linux kernel's MediaTek MT7530 DSA (Distributed Switch
  Architecture) driver. During device removal or driver unbinding, interrupt
  mappings are prematurely disposed while the parent interrupt is still active.
  A local…
severity: medium
cvss: 4.1
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe: CWE-476
vendor: Red Hat
product: Linux
affected:
  - >-
    Linux >= 254f6b272e3b67bf31c42ee9da62a449d74d1478 <
    2357c682f6eaf639dec88c68b3c0c93a3b802635
  - >-
    Linux >= 254f6b272e3b67bf31c42ee9da62a449d74d1478 <
    f306e465b5a2091cd3fe3dd0feb10cfc94cfb2f8
  - >-
    Linux >= 254f6b272e3b67bf31c42ee9da62a449d74d1478 <
    0d80ba0a204c6a16bd7778b50de578dff107c0fe
  - Linux 6.15
published: '2026-10-18'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T02:36:17+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98564.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98564.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98564'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2554989'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98564'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98564'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98564.mbox
  - url: 'https://git.kernel.org/stable/c/2357c682f6eaf639dec88c68b3c0c93a3b802635'
  - url: 'https://git.kernel.org/stable/c/f306e465b5a2091cd3fe3dd0feb10cfc94cfb2f8'
  - url: 'https://git.kernel.org/stable/c/0d80ba0a204c6a16bd7778b50de578dff107c0fe'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00198
epssPercentile: 0.09468
ingestedAt: '2026-10-18T15:45:12.259Z'
---

## Overview

A flaw was found in the Linux kernel's MediaTek MT7530 DSA (Distributed Switch Architecture) driver. During device removal or driver unbinding, interrupt mappings are prematurely disposed while the parent interrupt is still active. A local privileged user could trigger this flaw during device unbinding, causing the interrupt thread to dereference a null pointer, resulting in a kernel crash and Denial of Service (DoS).

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98564.json)

**kernel: net: dsa: mt7530: leave the MDIO IRQ mappings to regmap-irq** — 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.