---
id: CVE-2026-80605
title: 'HID: picolcd: prevent NULL pointer dereference in picolcd_send_and_wait()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  HID: picolcd: prevent NULL pointer dereference in picolcd_send_and_wait()

  In picolcd_send_and_wait(), an integer overflow of the signed loop counter
  'k' can theoretica…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <
    42dc0b7b55fe0499fc09183f34a1c46d1dcccf77
  - >-
    Linux >= fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <
    48caee2c106b03301c72fe389ebff00d852c58d5
  - >-
    Linux >= fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <
    dc176447c7279435c46735db7da81aed1ec25cc2
  - >-
    Linux >= fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <
    a02d5d7ad7ae5fa3756b8332f7350e973085dcb3
  - >-
    Linux >= fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <
    e4edeefb8d5bfceb2058e2b3291f4ae1e5a76e61
  - >-
    Linux >= fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <
    d354e523c6f740db758cafcd4c11bb7913285ed8
  - >-
    Linux >= fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <
    ef649703dce0df1364fcec3cdad9b32d1c522939
  - >-
    Linux >= fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 <
    0021eb09041f021c079be1022934a280f7f176c0
  - Linux 3.7
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T17:02:03.210731Z'
published: '2026-08-28'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T17:05:52.106Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-80605'
references:
  - url: 'https://git.kernel.org/stable/c/42dc0b7b55fe0499fc09183f34a1c46d1dcccf77'
  - url: 'https://git.kernel.org/stable/c/48caee2c106b03301c72fe389ebff00d852c58d5'
  - url: 'https://git.kernel.org/stable/c/dc176447c7279435c46735db7da81aed1ec25cc2'
  - url: 'https://git.kernel.org/stable/c/a02d5d7ad7ae5fa3756b8332f7350e973085dcb3'
  - url: 'https://git.kernel.org/stable/c/e4edeefb8d5bfceb2058e2b3291f4ae1e5a76e61'
  - url: 'https://git.kernel.org/stable/c/d354e523c6f740db758cafcd4c11bb7913285ed8'
  - url: 'https://git.kernel.org/stable/c/ef649703dce0df1364fcec3cdad9b32d1c522939'
  - url: 'https://git.kernel.org/stable/c/0021eb09041f021c079be1022934a280f7f176c0'
tags:
  - cve.org
epss: 0.0022
epssPercentile: 0.1254
ingestedAt: '2026-11-06T18:00:12.540Z'
---

## Overview

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

HID: picolcd: prevent NULL pointer dereference in picolcd_send_and_wait()

In picolcd_send_and_wait(), an integer overflow of the signed loop counter
'k' can theoretically lead to a NULL pointer dereference of 'raw_data'.
If the loop executes more than INT_MAX times, 'k' becomes negative,
making the condition 'k < size' true even when 'size' is 0.

Change the type of 'k' to 'unsigned int' to prevent the overflow and
eliminate the out-of-bounds access.

Found by Linux Verification Center (linuxtesting.org) with the Svace static
analysis tool.

[jkosina@suse.com: extended hash length]

## Affected

- `Linux >= fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 < 42dc0b7b55fe0499fc09183f34a1c46d1dcccf77`
- `Linux >= fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 < 48caee2c106b03301c72fe389ebff00d852c58d5`
- `Linux >= fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 < dc176447c7279435c46735db7da81aed1ec25cc2`
- `Linux >= fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 < a02d5d7ad7ae5fa3756b8332f7350e973085dcb3`
- `Linux >= fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 < e4edeefb8d5bfceb2058e2b3291f4ae1e5a76e61`
- `Linux >= fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 < d354e523c6f740db758cafcd4c11bb7913285ed8`
- `Linux >= fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 < ef649703dce0df1364fcec3cdad9b32d1c522939`
- `Linux >= fabdbf2fd22fa170b4c5340dbdda5c8cd88fb205 < 0021eb09041f021c079be1022934a280f7f176c0`
- `Linux 3.7`

## Remediation

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