---
id: CVE-2026-98501
title: 'HID: alps: fix use-after-free on input2 registration failure'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  HID: alps: fix use-after-free on input2 registration failure

  alps_input_configured() stores data->input2 before calling
  input_register_device().  If registration fails…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 2562756dde550901c224e3805102bdfc17e7d13a <
    64f824dccfd316fd3db8ea1cc4e8a76ad6a02740
  - >-
    Linux >= 2562756dde550901c224e3805102bdfc17e7d13a <
    2e55d76e6e8a756f6d87c241de975599f82b02fa
  - >-
    Linux >= 2562756dde550901c224e3805102bdfc17e7d13a <
    ef8ca5bb4c8b9696f38b1bebce1c851baa02b77b
  - >-
    Linux >= 2562756dde550901c224e3805102bdfc17e7d13a <
    5a8ad63158165bacd6a1d7420e0fe5364c913b06
  - >-
    Linux >= 2562756dde550901c224e3805102bdfc17e7d13a <
    47e5e177e9e4e10da6f2759d5ce8d049e33efdc4
  - >-
    Linux >= 2562756dde550901c224e3805102bdfc17e7d13a <
    925da1d2a24787f24872de13a4680437c54de179
  - >-
    Linux >= 2562756dde550901c224e3805102bdfc17e7d13a <
    443f6b93442b10b972a16f57ceaaea75b77892b6
  - >-
    Linux >= 2562756dde550901c224e3805102bdfc17e7d13a <
    d3aba3442798ce4a4c8ce3104d7b286d61e605f9
  - Linux 4.8
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T15:16:46.205Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98501'
references:
  - url: 'https://git.kernel.org/stable/c/64f824dccfd316fd3db8ea1cc4e8a76ad6a02740'
  - url: 'https://git.kernel.org/stable/c/2e55d76e6e8a756f6d87c241de975599f82b02fa'
  - url: 'https://git.kernel.org/stable/c/ef8ca5bb4c8b9696f38b1bebce1c851baa02b77b'
  - url: 'https://git.kernel.org/stable/c/5a8ad63158165bacd6a1d7420e0fe5364c913b06'
  - url: 'https://git.kernel.org/stable/c/47e5e177e9e4e10da6f2759d5ce8d049e33efdc4'
  - url: 'https://git.kernel.org/stable/c/925da1d2a24787f24872de13a4680437c54de179'
  - url: 'https://git.kernel.org/stable/c/443f6b93442b10b972a16f57ceaaea75b77892b6'
  - url: 'https://git.kernel.org/stable/c/d3aba3442798ce4a4c8ce3104d7b286d61e605f9'
tags:
  - cve.org
ingestedAt: '2026-10-18T15:45:12.288Z'
---

## Overview

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

HID: alps: fix use-after-free on input2 registration failure

alps_input_configured() stores data->input2 before calling
input_register_device().  If registration fails, input_free_device()
frees the input device but data->input2 still points to the freed memory.
alps_input_configured() calls hid_hw_open() before allocating input2, so
URBs are already active and raw_event can fire during the failure window.
A U1_SP_ABSOLUTE_REPORT_ID report arriving then causes u1_raw_event()
to dereference the freed data->input2 -> use-after-free.

Fix by only storing input2 into drvdata after successful registration
and adding a NULL guard in the raw_event path.

## Affected

- `Linux >= 2562756dde550901c224e3805102bdfc17e7d13a < 64f824dccfd316fd3db8ea1cc4e8a76ad6a02740`
- `Linux >= 2562756dde550901c224e3805102bdfc17e7d13a < 2e55d76e6e8a756f6d87c241de975599f82b02fa`
- `Linux >= 2562756dde550901c224e3805102bdfc17e7d13a < ef8ca5bb4c8b9696f38b1bebce1c851baa02b77b`
- `Linux >= 2562756dde550901c224e3805102bdfc17e7d13a < 5a8ad63158165bacd6a1d7420e0fe5364c913b06`
- `Linux >= 2562756dde550901c224e3805102bdfc17e7d13a < 47e5e177e9e4e10da6f2759d5ce8d049e33efdc4`
- `Linux >= 2562756dde550901c224e3805102bdfc17e7d13a < 925da1d2a24787f24872de13a4680437c54de179`
- `Linux >= 2562756dde550901c224e3805102bdfc17e7d13a < 443f6b93442b10b972a16f57ceaaea75b77892b6`
- `Linux >= 2562756dde550901c224e3805102bdfc17e7d13a < d3aba3442798ce4a4c8ce3104d7b286d61e605f9`
- `Linux 4.8`

## Remediation

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