---
id: CVE-2026-93803
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: libipw: fix key index receive bound checks

  libipw_rx() reads skb->data[hdrlen + 3] to extract the WEP key index in
  both the software-decrypt key selection path a…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: libipw: fix key index receive bound checks

  libipw_rx() reads skb->data[hdrlen + 3] to extract the WEP key index in
  both the software-decrypt key selection path a…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    062840bdc9ee06169b3c371bf66711f1d7ec0bf4
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    c54b643e9a0936d038921c547736574fd7382cea
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    74ed3669f26803b1761c1f55403062bea44c3466
  - Linux < 6.12.111
  - Linux < 6.18.53
  - Linux (all versions)
published: '2026-09-24'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T13:17:21.170'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93803'
references:
  - url: 'https://git.kernel.org/stable/c/062840bdc9ee06169b3c371bf66711f1d7ec0bf4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/74ed3669f26803b1761c1f55403062bea44c3466'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c54b643e9a0936d038921c547736574fd7382cea'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-24T16:47:15.897Z'
---

## Overview

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

wifi: libipw: fix key index receive bound checks

libipw_rx() reads skb->data[hdrlen + 3] to extract the WEP key index in
both the software-decrypt key selection path and the hardware-decrypted
IV/ICV strip path. In both places the existing guard only checks
skb->len >= hdrlen + 3, which proves bytes up to hdrlen + 2 but not the
byte at hdrlen + 3.

Require hdrlen + 4 bytes before reading that item in both paths. This is
a local source-boundary check only; it does not change the key index
semantics.

## Remediation

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