---
id: CVE-2025-37836
title: 'PCI: Fix reference leak in pci_register_host_bridge()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  PCI: Fix reference leak in pci_register_host_bridge()

  If device_register() fails, call put_device() to give up the reference to
  avoid a memory leak, per the comment at…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 <
    f4db1b2c9ae3d013733c302ee70cac943b7070c0
  - >-
    Linux >= 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 <
    3297497ad2246eb9243849bfbbc57a0dea97d76e
  - >-
    Linux >= 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 <
    b783478e0c53ffb4f04f25fb4e21ef7f482b05df
  - >-
    Linux >= 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 <
    bd2a352a0d72575f1842d28c14c10089f0cfe1ae
  - >-
    Linux >= 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 <
    9707d0c932f41006a2701afc926b232b50e356b4
  - >-
    Linux >= 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 <
    bbba4c50a2d2a1d3f3bf31cc4b8280cb492bf2c7
  - >-
    Linux >= 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 <
    f9208aec86226524ec1cb68a09ac70e974ea6536
  - >-
    Linux >= 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 <
    804443c1f27883926de94c849d91f5b7d7d696e9
  - Linux 4.10
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T20:41:45.918463Z'
published: '2025-05-09'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:52:04.416Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-37836'
references:
  - url: 'https://git.kernel.org/stable/c/f4db1b2c9ae3d013733c302ee70cac943b7070c0'
  - url: 'https://git.kernel.org/stable/c/3297497ad2246eb9243849bfbbc57a0dea97d76e'
  - url: 'https://git.kernel.org/stable/c/b783478e0c53ffb4f04f25fb4e21ef7f482b05df'
  - url: 'https://git.kernel.org/stable/c/bd2a352a0d72575f1842d28c14c10089f0cfe1ae'
  - url: 'https://git.kernel.org/stable/c/9707d0c932f41006a2701afc926b232b50e356b4'
  - url: 'https://git.kernel.org/stable/c/bbba4c50a2d2a1d3f3bf31cc4b8280cb492bf2c7'
  - url: 'https://git.kernel.org/stable/c/f9208aec86226524ec1cb68a09ac70e974ea6536'
  - url: 'https://git.kernel.org/stable/c/804443c1f27883926de94c849d91f5b7d7d696e9'
tags:
  - cve.org
epss: 0.00314
epssPercentile: 0.24481
ingestedAt: '2026-11-05T22:38:31.882Z'
---

## Overview

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

PCI: Fix reference leak in pci_register_host_bridge()

If device_register() fails, call put_device() to give up the reference to
avoid a memory leak, per the comment at device_register().

Found by code review.

[bhelgaas: squash Dan Carpenter's double free fix from
https://lore.kernel.org/r/db806a6c-a91b-4e5a-a84b-6b7e01bdac85@stanley.mountain]

## Affected

- `Linux >= 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 < f4db1b2c9ae3d013733c302ee70cac943b7070c0`
- `Linux >= 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 < 3297497ad2246eb9243849bfbbc57a0dea97d76e`
- `Linux >= 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 < b783478e0c53ffb4f04f25fb4e21ef7f482b05df`
- `Linux >= 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 < bd2a352a0d72575f1842d28c14c10089f0cfe1ae`
- `Linux >= 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 < 9707d0c932f41006a2701afc926b232b50e356b4`
- `Linux >= 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 < bbba4c50a2d2a1d3f3bf31cc4b8280cb492bf2c7`
- `Linux >= 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 < f9208aec86226524ec1cb68a09ac70e974ea6536`
- `Linux >= 37d6a0a6f4700ad3ae7bbf8db38b4557e97b3fe4 < 804443c1f27883926de94c849d91f5b7d7d696e9`
- `Linux 4.10`

## Remediation

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