---
id: CVE-2026-80918
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  HID: core: fix number/pointer type confusion on long items

  When fetch_item() is called by hid_scan_report() on an item with
  HID_ITEM_TAG_LONG, it stores a pointer to t…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  HID: core: fix number/pointer type confusion on long items

  When fetch_item() is called by hid_scan_report() on an item with
  HID_ITEM_TAG_LONG, it stores a pointer to t…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 3dc8fc083dbfeede7b63a0c07581192e97711365 <
    bed7fe3a936b6bdd84671385951397ca673cf6e7
  - >-
    Linux >= 3dc8fc083dbfeede7b63a0c07581192e97711365 <
    aec2c2ec87d4ec1f098979f68cd81b29f031c8cb
  - >-
    Linux >= 3dc8fc083dbfeede7b63a0c07581192e97711365 <
    634f498ea5d5e8e01f8d9414d4f45eeaf9ee1996
  - >-
    Linux >= 3dc8fc083dbfeede7b63a0c07581192e97711365 <
    abec577de5fc16cd5caae42f97cdcd0983c06d66
  - >-
    Linux >= 3dc8fc083dbfeede7b63a0c07581192e97711365 <
    dd8035dec26e98204d6e4a6e0cee5c4d329b3d7e
  - >-
    Linux >= 3dc8fc083dbfeede7b63a0c07581192e97711365 <
    1fa1591efd417e39e5e164bebea8ca7a3837c469
  - >-
    Linux >= 3dc8fc083dbfeede7b63a0c07581192e97711365 <
    e60159f5ea60254a5c3de4ea4f2f939f0171031b
  - >-
    Linux >= 3dc8fc083dbfeede7b63a0c07581192e97711365 <
    e542edada3f79387c0ac2a528cebf01f4ef47df8
  - >-
    Linux >= 3dc8fc083dbfeede7b63a0c07581192e97711365 <
    28abce951343fcec26e397610868efa4e1395c3f
  - Linux 3.12
published: '2026-09-09'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T17:17:46.847'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80918'
references:
  - url: 'https://git.kernel.org/stable/c/1fa1591efd417e39e5e164bebea8ca7a3837c469'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/28abce951343fcec26e397610868efa4e1395c3f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/634f498ea5d5e8e01f8d9414d4f45eeaf9ee1996'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/abec577de5fc16cd5caae42f97cdcd0983c06d66'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/aec2c2ec87d4ec1f098979f68cd81b29f031c8cb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bed7fe3a936b6bdd84671385951397ca673cf6e7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/dd8035dec26e98204d6e4a6e0cee5c4d329b3d7e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e542edada3f79387c0ac2a528cebf01f4ef47df8'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e60159f5ea60254a5c3de4ea4f2f939f0171031b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-14T13:08:14.761Z'
epss: 0.00182
epssPercentile: 0.07992
---

## Overview

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

HID: core: fix number/pointer type confusion on long items

When fetch_item() is called by hid_scan_report() on an item with
HID_ITEM_TAG_LONG, it stores a pointer to the item data in
item->data.longdata instead of storing a value directly in
item->data.{u8/u16/u32}.

When item_udata() or item_sdata() encounters such an item, it incorrectly
assumes that the item is in short format, and therefore returns the lower
part of a kernel pointer reinterpreted as a number.

When a HID device is connected whose descriptor contains a
HID_GLOBAL_ITEM_TAG_REPORT_SIZE encoded in long format with size=4, this
causes the lower half of a kernel pointer to be printed into dmesg as a
number, like this:

    hid (null): invalid report_size 107953555

To fix it, let item_udata() and item_sdata() verify that the item is in
short format.

Note that this bug only affects hid_scan_report(), while the main parsing
pass hid_parse_collections() will always bail out when encountering a long
item.

Sidenote: There are currently no users of data.longdata; maybe we should
just remove any parsing of long-format descriptors as a follow-up.

## Remediation

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