---
id: CVE-2026-98890
title: 'wifi: libertas: reject short monitor TX frames'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: libertas: reject short monitor TX frames

  In monitor mode, lbs_hard_start_xmit() casts skb->data to a
  radiotap TX header, skips that header, and then copies the 8…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 <
    68c92c991ddb75dfd3fd62a94a1d4d2dde44dc3c
  - >-
    Linux >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 <
    d865dd6de8295f2bfaa83f0f5d49d2bef1543065
  - >-
    Linux >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 <
    6576baa3fdbaa91fa75e4ba27095f4b8a27349a8
  - >-
    Linux >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 <
    b657cc98d7936c5d9ed7e0e1944ad0e1f36375bb
  - >-
    Linux >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 <
    443fac3de65c76544b450b9f9903be8989150d55
  - >-
    Linux >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 <
    cdcfd662c67833d89ee3d912efde2eb67c8a7326
  - >-
    Linux >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 <
    13ff543e0b2c713aedeaadadde686686e949dc78
  - Linux 2.6.22
published: '2026-10-23'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T06:56:15.594Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98890'
references:
  - url: 'https://git.kernel.org/stable/c/68c92c991ddb75dfd3fd62a94a1d4d2dde44dc3c'
  - url: 'https://git.kernel.org/stable/c/d865dd6de8295f2bfaa83f0f5d49d2bef1543065'
  - url: 'https://git.kernel.org/stable/c/6576baa3fdbaa91fa75e4ba27095f4b8a27349a8'
  - url: 'https://git.kernel.org/stable/c/b657cc98d7936c5d9ed7e0e1944ad0e1f36375bb'
  - url: 'https://git.kernel.org/stable/c/443fac3de65c76544b450b9f9903be8989150d55'
  - url: 'https://git.kernel.org/stable/c/cdcfd662c67833d89ee3d912efde2eb67c8a7326'
  - url: 'https://git.kernel.org/stable/c/13ff543e0b2c713aedeaadadde686686e949dc78'
tags:
  - cve.org
epss: 0.00187
epssPercentile: 0.08199
ingestedAt: '2026-10-23T13:24:55.579Z'
---

## Overview

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

wifi: libertas: reject short monitor TX frames

In monitor mode, lbs_hard_start_xmit() casts skb->data to a
radiotap TX header, skips that header, and then copies the 802.11
destination address from offset 4 in the remaining frame.  The
generic length check only rejects zero-length and oversized skbs, so
a short monitor frame can be read past the end of the skb data.

Require enough bytes for the radiotap TX header and the destination
address field before using the monitor-mode header layout.

## Affected

- `Linux >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 < 68c92c991ddb75dfd3fd62a94a1d4d2dde44dc3c`
- `Linux >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 < d865dd6de8295f2bfaa83f0f5d49d2bef1543065`
- `Linux >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 < 6576baa3fdbaa91fa75e4ba27095f4b8a27349a8`
- `Linux >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 < b657cc98d7936c5d9ed7e0e1944ad0e1f36375bb`
- `Linux >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 < 443fac3de65c76544b450b9f9903be8989150d55`
- `Linux >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 < cdcfd662c67833d89ee3d912efde2eb67c8a7326`
- `Linux >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 < 13ff543e0b2c713aedeaadadde686686e949dc78`
- `Linux 2.6.22`

## Remediation

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