---
id: CVE-2026-89627
title: 'HID: roccat: free buffered reports when destroying device'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  HID: roccat: free buffered reports when destroying device

  roccat_report_event() duplicates each report with kmemdup() and stores
  the allocation in a circular-buffer sl…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-772
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378 <
    cebb20b9a29cfc90bf56e54337333084f85a69dd
  - >-
    Linux >= 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378 <
    690da9177e64bcfda2f4c0b5b8465178e4a236d8
  - >-
    Linux >= 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378 <
    b3cc411daa50b39ba5706492a80a5a0804d9c85f
  - >-
    Linux >= 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378 <
    4cb3ff31d237ad1f515455c497ef07d7172d912b
  - >-
    Linux >= 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378 <
    943b8dc2c6044c01e36395f51bb809a4b6bdfd22
  - >-
    Linux >= 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378 <
    da00eac19feef209c9591e48c860afc2014603be
  - >-
    Linux >= 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378 <
    fbb5a60f5c31b5625f0d89a79912fbcb2559289b
  - >-
    Linux >= 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378 <
    bbff0ccbff360a5498075525005f6a913239a3d7
  - Linux 2.6.35
published: '2026-09-11'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T08:49:59.521Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-89627'
references:
  - url: 'https://git.kernel.org/stable/c/cebb20b9a29cfc90bf56e54337333084f85a69dd'
  - url: 'https://git.kernel.org/stable/c/690da9177e64bcfda2f4c0b5b8465178e4a236d8'
  - url: 'https://git.kernel.org/stable/c/b3cc411daa50b39ba5706492a80a5a0804d9c85f'
  - url: 'https://git.kernel.org/stable/c/4cb3ff31d237ad1f515455c497ef07d7172d912b'
  - url: 'https://git.kernel.org/stable/c/943b8dc2c6044c01e36395f51bb809a4b6bdfd22'
  - url: 'https://git.kernel.org/stable/c/da00eac19feef209c9591e48c860afc2014603be'
  - url: 'https://git.kernel.org/stable/c/fbb5a60f5c31b5625f0d89a79912fbcb2559289b'
  - url: 'https://git.kernel.org/stable/c/bbff0ccbff360a5498075525005f6a913239a3d7'
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89627.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89627'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532449'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89627'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89627'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89627.mbox
tags:
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00216
epssPercentile: 0.12006
ingestedAt: '2026-09-14T15:23:07.450Z'
---

## Overview

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

HID: roccat: free buffered reports when destroying device

roccat_report_event() duplicates each report with kmemdup() and stores
the allocation in a circular-buffer slot. The allocation is released only
when that slot is reused.

The device destruction paths free struct roccat_device without releasing
reports still stored in cbuf[]. This makes those allocations unreachable
and leaks up to ROCCAT_CBUF_SIZE report buffers per device.

Add a small destructor that frees every buffered report before freeing the
device, and use it in both paths that can destroy a registered device.

## Affected

- `Linux >= 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378 < cebb20b9a29cfc90bf56e54337333084f85a69dd`
- `Linux >= 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378 < 690da9177e64bcfda2f4c0b5b8465178e4a236d8`
- `Linux >= 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378 < b3cc411daa50b39ba5706492a80a5a0804d9c85f`
- `Linux >= 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378 < 4cb3ff31d237ad1f515455c497ef07d7172d912b`
- `Linux >= 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378 < 943b8dc2c6044c01e36395f51bb809a4b6bdfd22`
- `Linux >= 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378 < da00eac19feef209c9591e48c860afc2014603be`
- `Linux >= 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378 < fbb5a60f5c31b5625f0d89a79912fbcb2559289b`
- `Linux >= 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378 < bbff0ccbff360a5498075525005f6a913239a3d7`
- `Linux 2.6.35`

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, 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 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89627.json)