---
id: CVE-2026-63947
title: 'Bluetooth: HIDP: fix missing length checks in hidp_input_report()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  Bluetooth: HIDP: fix missing length checks in hidp_input_report()

  hidp_input_report() reads keyboard and mouse payload data from an skb
  without first verifying that sk…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    1f08a90013e1e632b34321334e861fcefc056505
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    cc3832b19f863e3677c5651f001a2e3795f39eb8
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    d313683d6ccdd8c01e0562270a2ae25b86d8461d
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    d7d6a81b8dd1a8d084a1b755db9406041d53adb5
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    6348dfed5b0f9c6074f14322332e97493d32fef0
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    b83dcacd2ec7fcc5a48be215f82d573759f87ec2
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    2a3ac9ee11dbb9845f3947cef4a79dba658cf6f6
  - Linux 2.6.12
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:34:08.064493Z'
published: '2026-07-19'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:42:14.377Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-63947'
references:
  - url: 'https://git.kernel.org/stable/c/1f08a90013e1e632b34321334e861fcefc056505'
  - url: 'https://git.kernel.org/stable/c/cc3832b19f863e3677c5651f001a2e3795f39eb8'
  - url: 'https://git.kernel.org/stable/c/d313683d6ccdd8c01e0562270a2ae25b86d8461d'
  - url: 'https://git.kernel.org/stable/c/d7d6a81b8dd1a8d084a1b755db9406041d53adb5'
  - url: 'https://git.kernel.org/stable/c/6348dfed5b0f9c6074f14322332e97493d32fef0'
  - url: 'https://git.kernel.org/stable/c/b83dcacd2ec7fcc5a48be215f82d573759f87ec2'
  - url: 'https://git.kernel.org/stable/c/2a3ac9ee11dbb9845f3947cef4a79dba658cf6f6'
tags:
  - cve.org
epss: 0.00346
epssPercentile: 0.26599
ingestedAt: '2026-10-16T17:24:46.785Z'
---

## Overview

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

Bluetooth: HIDP: fix missing length checks in hidp_input_report()

hidp_input_report() reads keyboard and mouse payload data from an skb
without first verifying that skb->len contains enough data.

hidp_recv_intr_frame() pulls the 1-byte HIDP header before dispatching
to hidp_input_report(). If a paired device sends a truncated packet,
the handler reads beyond the valid skb data, resulting in an
out-of-bounds read of skb data. The OOB bytes may be interpreted as
phantom key presses or spurious mouse movement.

Replace the open-coded length tracking and pointer arithmetic with
skb_pull_data() calls. skb_pull_data() returns NULL if the requested
bytes are not present, eliminating the need for a manual size variable
and the separate skb->len guard.

## Affected

- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1f08a90013e1e632b34321334e861fcefc056505`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < cc3832b19f863e3677c5651f001a2e3795f39eb8`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d313683d6ccdd8c01e0562270a2ae25b86d8461d`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d7d6a81b8dd1a8d084a1b755db9406041d53adb5`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6348dfed5b0f9c6074f14322332e97493d32fef0`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b83dcacd2ec7fcc5a48be215f82d573759f87ec2`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2a3ac9ee11dbb9845f3947cef4a79dba658cf6f6`
- `Linux 2.6.12`

## Remediation

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