---
id: CVE-2026-98186
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mwifiex: bound the pairwise-cipher OUI walk to the IE length

  mwifiex_search_oui_in_ie() reads a pairwise-cipher (PTK) count from a
  beacon/probe-response RSN or W…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: mwifiex: bound the pairwise-cipher OUI walk to the IE length

  mwifiex_search_oui_in_ie() reads a pairwise-cipher (PTK) count from a
  beacon/probe-response RSN or W…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e <
    77e642af7f2f6029e12a35c847c56cbd0466e799
  - >-
    Linux >= 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e <
    982b8fcdbb28f63bbbf02f0822c0bbda12ec27ed
  - >-
    Linux >= 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e <
    58767b41f87244eebaa5a475b9d276c83b89b933
  - >-
    Linux >= 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e <
    2402c9e2644b7e10c7aaaf87bf12743d7e363559
  - >-
    Linux >= 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e <
    54a9cc5bd70b0d77a5069d4c46998c679a10c857
  - >-
    Linux >= 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e <
    8bbef2b1ebfbadc0b9c37bbbf9c9e26fe2e41960
  - >-
    Linux >= 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e <
    46cda9d42f0d6ec3057d878ddb1f38c0ab9f51df
  - >-
    Linux >= 5e6e3a92b9a4c9416b17f468fa5c7fa2233b8b4e <
    e667aee1c192d67d27c803007bfa9c6e0873e959
  - Linux 3.0
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T09:18:03.540'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98186'
references:
  - url: 'https://git.kernel.org/stable/c/2402c9e2644b7e10c7aaaf87bf12743d7e363559'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/46cda9d42f0d6ec3057d878ddb1f38c0ab9f51df'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/54a9cc5bd70b0d77a5069d4c46998c679a10c857'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/58767b41f87244eebaa5a475b9d276c83b89b933'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/77e642af7f2f6029e12a35c847c56cbd0466e799'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8bbef2b1ebfbadc0b9c37bbbf9c9e26fe2e41960'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/982b8fcdbb28f63bbbf02f0822c0bbda12ec27ed'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e667aee1c192d67d27c803007bfa9c6e0873e959'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-06T08:50:17.450Z'
---

## Overview

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

wifi: mwifiex: bound the pairwise-cipher OUI walk to the IE length

mwifiex_search_oui_in_ie() reads a pairwise-cipher (PTK) count from a
beacon/probe-response RSN or WPA information element and then walks that
many 4-byte OUIs, comparing each with memcmp(). The count comes straight
from the (attacker-supplied) IE and is never checked against the
element's own length, and the callers admit the element on element_id
alone (has_ieee_hdr() / has_vendor_hdr(), no length check). A crafted
RSN/WPA IE with a large pairwise count therefore makes the walk read up
to 255 * 4 bytes past the element -- an out-of-bounds read of the
kmemdup()'d beacon buffer, reachable from any AP whose beacon/probe
response is processed during scan-result parsing.

Pass the number of IE bytes available at the OUI list and bound the walk
to the element. Keep the length signed and reject a negative value
before any unsigned arithmetic, so a small or zero IE length cannot
underflow to a large size_t and defeat the bound.

Found by 0sec automated security-research tooling (https://0sec.ai).

## Remediation

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