---
id: CVE-2026-89628
title: >-
  kernel: HID: picolcd: clamp eeprom debugfs read to bytes actually received
  (CVE-2026-89628)
summary: >-
  A flaw was found in the Human Interface Device (HID) picolcd driver in the
  Linux kernel. A local attacker with root privileges, by using a specially
  crafted or spoofed picoLCD device, could exploit an out-of-bounds read
  vulnerability in th…
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-805
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 7
  - enterprise_linux 8
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-09-11'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T22:37:18+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89628.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89628.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-89628'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532179'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-89628'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89628'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89628.mbox
  - url: 'https://git.kernel.org/stable/c/471f4a939c66d1d44aece2321807abf609fc9098'
  - url: 'https://git.kernel.org/stable/c/699a3c8b56e168ca19d12722f3f5ef1d6f4b1d84'
  - url: 'https://git.kernel.org/stable/c/a3e6e8d7198a9f3861861520a38b673684a1062b'
  - url: 'https://git.kernel.org/stable/c/e9c667395ac1f8024f623250b32bae4c7af9caa0'
  - url: 'https://git.kernel.org/stable/c/1a02056c2bf7ef9b5fd05ee6913aeeadb703c443'
  - url: 'https://git.kernel.org/stable/c/65daa322f1021d8206f8032c4cd4c0cb2d26c7c3'
  - url: 'https://git.kernel.org/stable/c/8dc662af019158690c470edd2e2857657f700abb'
  - url: 'https://git.kernel.org/stable/c/4daf432c94a42e7be6aa10b012b33af5ed9bc118'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.0022
epssPercentile: 0.12709
ingestedAt: '2026-09-14T15:23:07.450Z'
---

## Overview

A flaw was found in the Human Interface Device (HID) picolcd driver in the Linux kernel. A local attacker with root privileges, by using a specially crafted or spoofed picoLCD device, could exploit an out-of-bounds read vulnerability in the picolcd_debug_eeprom_read() function. This flaw occurs because the function trusts a device-supplied length without proper validation against the actual received data size. Successful exploitation could lead to the disclosure of sensitive information from adjacent kernel memory to userspace.

## Vendor advisories

- **Red Hat VEX** · Moderate · 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 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89628.json)

**kernel: HID: picolcd: clamp eeprom debugfs read to bytes actually received** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.

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
- Red Hat OpenShift Container Platform 4

Not affected:

- Red Hat Enterprise Linux 6

## Remediation

Fix deferred