---
id: CVE-2026-74648
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  staging: rtl8723bs: validate monitor transmit frame lengths

  rtw_cfg80211_monitor_if_xmit_entry() removes the radiotap header and
  then reads the 802.11 frame control fi…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  staging: rtl8723bs: validate monitor transmit frame lengths

  rtw_cfg80211_monitor_if_xmit_entry() removes the radiotap header and
  then reads the 802.11 frame control fi…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
published: '2026-08-22'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T13:10:00.187'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74648'
references:
  - url: 'https://git.kernel.org/stable/c/6829665d050983907b560173e49dcc6c11cb2730'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7b0f62d2986a28e5e4188366bc2f4e2868b14790'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7edd3adb0c80d70b4237640275c559610f438476'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8b3e4ed9c35d3d3b64fcc23f4a1f22b37c1865b1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a3ac6d849de5f7abe14761d741bbb843ac793454'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bd88f6289b7e483216a9c1df15a0460ef9b02cb6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c5e5d78743992e235b76d2ebe5a403d60315aa8a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f03398d835f5249c49546f0eb0d0df6792b95d5f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00129
epssPercentile: 0.02244
ingestedAt: '2026-10-14T13:30:58.526Z'
---

## Overview

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

staging: rtl8723bs: validate monitor transmit frame lengths

rtw_cfg80211_monitor_if_xmit_entry() removes the radiotap header and
then reads the 802.11 frame control field without checking that a base
802.11 header remains.

The data path also pulls the calculated 802.11, QoS and SNAP header
span before confirming that the skb contains it. A truncated frame can
therefore cause out-of-bounds reads or leave insufficient data for the
Ethernet address writes.

Reject frames that do not contain the base 802.11 header and data
frames that do not contain their complete calculated header span.

## Remediation

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