---
id: CVE-2026-93826
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  HID: hidpp: fix potential UAF in hidpp_connect_event()

  If input_register_device() fails, we call input_free_device(), but keep
  stale pointer to the old device in hidpp…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  HID: hidpp: fix potential UAF in hidpp_connect_event()

  If input_register_device() fails, we call input_free_device(), but keep
  stale pointer to the old device in hidpp…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= c39e3d5fc9dd3e16c6f59dd94d827540040de66d <
    e03fd646adad7f97fa4429ec5f38cee9bde5276e
  - >-
    Linux >= c39e3d5fc9dd3e16c6f59dd94d827540040de66d <
    5d7637f4d050d105177217e64b869f56f9825060
  - >-
    Linux >= c39e3d5fc9dd3e16c6f59dd94d827540040de66d <
    3b8b2e58b078cd30e121401535541bb8a6d57133
  - >-
    Linux >= c39e3d5fc9dd3e16c6f59dd94d827540040de66d <
    3303398cc2aa255ba251650a30024e11d48ea6c3
  - >-
    Linux >= c39e3d5fc9dd3e16c6f59dd94d827540040de66d <
    6df6b1f2c49678211f65647c300bc51dda02893b
  - Linux 3.19
published: '2026-09-24'
updated: '2026-10-03'
sourceUpdated: '2026-10-03T11:17:52.437'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93826'
references:
  - url: 'https://git.kernel.org/stable/c/3303398cc2aa255ba251650a30024e11d48ea6c3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3b8b2e58b078cd30e121401535541bb8a6d57133'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5d7637f4d050d105177217e64b869f56f9825060'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/6df6b1f2c49678211f65647c300bc51dda02893b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e03fd646adad7f97fa4429ec5f38cee9bde5276e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93826.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-93826'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2540538'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-93826'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93826'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93826.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.00234
epssPercentile: 0.14236
ingestedAt: '2026-09-24T16:47:15.891Z'
cwe:
  - CWE-825
scores:
  nvd: 7.5
  vendor: 5.5
---

## Overview

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

HID: hidpp: fix potential UAF in hidpp_connect_event()

If input_register_device() fails, we call input_free_device(), but keep
stale pointer to the old device in hidpp->input, which could potentially
lead to UAF. Fix that by resetting it to NULL before returning from
hidpp_connect_event().

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93826.json)