---
id: CVE-2026-92481
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  pinctrl: mediatek: free EINT resources on unbind

  mtk_eint_do_init() creates an IRQ domain, populates it with a mapping for
  every EINT line and installs a chained handl…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  pinctrl: mediatek: free EINT resources on unbind

  mtk_eint_do_init() creates an IRQ domain, populates it with a mapping for
  every EINT line and installs a chained handl…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= e46df235b4e605aa4e7609a27c118a1cccd4ff9a <
    23252bc1cd9a58a039c9b1ae77b22d2b33da48e9
  - >-
    Linux >= e46df235b4e605aa4e7609a27c118a1cccd4ff9a <
    903a7cdf63a81d3738594c5bd1b5955f58fda427
  - >-
    Linux >= e46df235b4e605aa4e7609a27c118a1cccd4ff9a <
    51552c8c60d3b1fecc062eab2d8cfeaa1cb339dd
  - >-
    Linux >= e46df235b4e605aa4e7609a27c118a1cccd4ff9a <
    7f6d898179ca4771ee602bdad4246c3952af83eb
  - >-
    Linux >= e46df235b4e605aa4e7609a27c118a1cccd4ff9a <
    e06785cba7f86d72abd531058b1a82d6952a7346
  - >-
    Linux >= e46df235b4e605aa4e7609a27c118a1cccd4ff9a <
    88292b7103d260e3e606eb3bb2794060a5fde48e
  - Linux 4.18
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:50.153'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92481'
references:
  - url: 'https://git.kernel.org/stable/c/23252bc1cd9a58a039c9b1ae77b22d2b33da48e9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/51552c8c60d3b1fecc062eab2d8cfeaa1cb339dd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7f6d898179ca4771ee602bdad4246c3952af83eb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/88292b7103d260e3e606eb3bb2794060a5fde48e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/903a7cdf63a81d3738594c5bd1b5955f58fda427'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e06785cba7f86d72abd531058b1a82d6952a7346'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.788Z'
epss: 0.00215
epssPercentile: 0.10558
---

## Overview

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

pinctrl: mediatek: free EINT resources on unbind

mtk_eint_do_init() creates an IRQ domain, populates it with a mapping for
every EINT line and installs a chained handler on the parent interrupt,
but none of these are ever released. This was harmless while the drivers
were built-in, but now that they can be built as modules and
unbound/rmmod'd it leaves behind a dangling IRQ domain, interrupt mappings
whose chip data points at freed memory, and a chained handler that keeps
firing into that freed data.

The plain allocations in mtk_eint_do_init() already use the device-managed
devm_*() helpers, so tear the remaining resources down the same way:
register a devm action that detaches the chained handler, waits for any
in-flight handler to finish, disposes of the per-line mappings and removes
the IRQ domain. This mirrors the device-managed lifecycle adopted for the
GPIO chip and keeps the whole EINT setup self-cleaning on unbind.

## Remediation

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