---
id: CVE-2026-90126
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  rtc: pcf8563: fix clock provider leak on unbind

  pcf8563_clkout_register_clk() registers the CLKOUT clock provider with
  of_clk_add_provider(), but nothing ever unwinds …
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  rtc: pcf8563: fix clock provider leak on unbind

  pcf8563_clkout_register_clk() registers the CLKOUT clock provider with
  of_clk_add_provider(), but nothing ever unwinds …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= a39a6405d5f949bc651694028a55d74c514ef1f9 <
    2b5622cf4ee218b6f98d31dbf3fbd44b9b6bd675
  - >-
    Linux >= a39a6405d5f949bc651694028a55d74c514ef1f9 <
    36cb00c33bd83e7ce31b5a9f1f7c70db0cb7776c
  - >-
    Linux >= a39a6405d5f949bc651694028a55d74c514ef1f9 <
    30b7c63af50fe1464e7582a37de1ca4bd030ecc1
  - >-
    Linux >= a39a6405d5f949bc651694028a55d74c514ef1f9 <
    7afb8db47c4f107bce89cfe5115fb31ba7c94665
  - >-
    Linux >= a39a6405d5f949bc651694028a55d74c514ef1f9 <
    97edf3fd9a46ea89a167966991c0449cfa07b36f
  - >-
    Linux >= a39a6405d5f949bc651694028a55d74c514ef1f9 <
    08a59c28c2bdbcd655e99526c86a41dc83834283
  - >-
    Linux >= a39a6405d5f949bc651694028a55d74c514ef1f9 <
    6218c0533a72235ec9c5f41b812c63d963bd4a3e
  - >-
    Linux >= a39a6405d5f949bc651694028a55d74c514ef1f9 <
    9c48a53685040bb0de45a640b34055cbbfc69d4f
  - Linux 4.4
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:04.937'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90126'
references:
  - url: 'https://git.kernel.org/stable/c/08a59c28c2bdbcd655e99526c86a41dc83834283'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2b5622cf4ee218b6f98d31dbf3fbd44b9b6bd675'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/30b7c63af50fe1464e7582a37de1ca4bd030ecc1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/36cb00c33bd83e7ce31b5a9f1f7c70db0cb7776c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6218c0533a72235ec9c5f41b812c63d963bd4a3e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7afb8db47c4f107bce89cfe5115fb31ba7c94665'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/97edf3fd9a46ea89a167966991c0449cfa07b36f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9c48a53685040bb0de45a640b34055cbbfc69d4f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.882Z'
epss: 0.00211
epssPercentile: 0.10034
---

## Overview

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

rtc: pcf8563: fix clock provider leak on unbind

pcf8563_clkout_register_clk() registers the CLKOUT clock provider with
of_clk_add_provider(), but nothing ever unwinds it: there is no
of_clk_del_provider() call and the driver has no remove callback. Each
of_clk_add_provider() allocates a struct of_clk_provider, takes a
reference on the OF node and adds an entry to the global of_clk_providers
list, none of which is released when the device is unbound. Every
bind/unbind (or module reload) therefore leaks a provider structure and
an of_node reference.

The clock itself is already device-managed (devm_clk_register()); only
the provider registration was not. Use devm_of_clk_add_hw_provider() so
the provider is removed automatically on unbind. Tie it to the parent
i2c device, whose OF node carries the #clock-cells and clock-output-names
properties (the RTC class device has no OF node of its own).

## Remediation

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