---
id: CVE-2026-64442
title: >-
  staging: rtl8723bs: fix OOB reads in IE loops in issue_assocreq() and
  join_cmd_hdl()
summary: >-
  In the Linux kernel, the following vulnerability has been resolved:


  staging: rtl8723bs: fix OOB reads in IE loops in issue_assocreq() and
  join_cmd_hdl()


  Two IE parsing loops are missing the header bounds checks before they

  dereference …
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    bc881c9915c4468747d0ca5fd1abd7b313cfb0f4
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    605ebd94d0f469204f3c9f2f84acc71e43e2780f
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    a830bdc82461353bf7b1f8a2ad2689bf5d2de444
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    4c21eec80cf502d9ea18e0b946246b2376452786
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    ad2637c46ef8b8ae0894372a2d39fdfcdc420a1e
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    c38d16b1ffac385c9e4b38447cd5c46af1114b58
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    402f13ec95945f34a210b28df1f8740d3d4a58c5
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    ef61d628dfad38fead1fd2e08979ae9126d011d5
  - Linux 4.12
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-16T15:40:51.646471Z'
published: '2026-07-25'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:42:36.392Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-64442'
references:
  - url: 'https://git.kernel.org/stable/c/bc881c9915c4468747d0ca5fd1abd7b313cfb0f4'
  - url: 'https://git.kernel.org/stable/c/605ebd94d0f469204f3c9f2f84acc71e43e2780f'
  - url: 'https://git.kernel.org/stable/c/a830bdc82461353bf7b1f8a2ad2689bf5d2de444'
  - url: 'https://git.kernel.org/stable/c/4c21eec80cf502d9ea18e0b946246b2376452786'
  - url: 'https://git.kernel.org/stable/c/ad2637c46ef8b8ae0894372a2d39fdfcdc420a1e'
  - url: 'https://git.kernel.org/stable/c/c38d16b1ffac385c9e4b38447cd5c46af1114b58'
  - url: 'https://git.kernel.org/stable/c/402f13ec95945f34a210b28df1f8740d3d4a58c5'
  - url: 'https://git.kernel.org/stable/c/ef61d628dfad38fead1fd2e08979ae9126d011d5'
tags:
  - cve.org
epss: 0.00286
epssPercentile: 0.19757
ingestedAt: '2026-10-16T17:24:46.821Z'
---

## Overview

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

staging: rtl8723bs: fix OOB reads in IE loops in issue_assocreq() and join_cmd_hdl()

Two IE parsing loops are missing the header bounds checks before they
dereference pIE->length:

 - issue_assocreq() walks pmlmeinfo->network.ies to build the
   association request. If the stored IE data ends with only an
   element_id byte and no length byte, pIE->length is read one byte
   past the end of the buffer.

 - join_cmd_hdl() walks pnetwork->ies during station join and has
   the same problem under the same conditions.

Both buffers are filled from AP beacon and probe-response frames, so a
malicious AP that sends a truncated final IE can trigger the issue.

Apply the two-guard pattern established in update_beacon_info():
  1. Break if fewer than sizeof(*pIE) bytes remain.
  2. Break if the IE's declared data extends past the buffer end.

## Affected

- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < bc881c9915c4468747d0ca5fd1abd7b313cfb0f4`
- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 605ebd94d0f469204f3c9f2f84acc71e43e2780f`
- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < a830bdc82461353bf7b1f8a2ad2689bf5d2de444`
- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 4c21eec80cf502d9ea18e0b946246b2376452786`
- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < ad2637c46ef8b8ae0894372a2d39fdfcdc420a1e`
- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < c38d16b1ffac385c9e4b38447cd5c46af1114b58`
- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 402f13ec95945f34a210b28df1f8740d3d4a58c5`
- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < ef61d628dfad38fead1fd2e08979ae9126d011d5`
- `Linux 4.12`

## Remediation

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