---
id: CVE-2026-93807
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers

  rsi_hal_load_key() copies tx_mic_key and rx_mic_key from data[16] and
  data[24] whenever key data is present…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers

  rsi_hal_load_key() copies tx_mic_key and rx_mic_key from data[16] and
  data[24] whenever key data is present…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    5902e3c08c63d65724772f74d65b9fb032625dca
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    55b86ef6c2e68879ffd95203b011ef42a013ab88
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    843fe9bc583b7686ca68312ac9319c9240a73c03
  - Linux < 6.12.111
  - Linux < 6.18.53
  - Linux (all versions)
published: '2026-09-24'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T13:17:21.577'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93807'
references:
  - url: 'https://git.kernel.org/stable/c/55b86ef6c2e68879ffd95203b011ef42a013ab88'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5902e3c08c63d65724772f74d65b9fb032625dca'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/843fe9bc583b7686ca68312ac9319c9240a73c03'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-24T16:47:15.896Z'
---

## Overview

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

wifi: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers

rsi_hal_load_key() copies tx_mic_key and rx_mic_key from data[16] and
data[24] whenever key data is present. Those offsets are only part of
the 32-byte TKIP key layout. Shorter keys used by other ciphers, such as
CCMP, do not provide those bytes, so the unconditional copies can read
past the supplied key buffer.

Only copy the MIC keys for TKIP, and reject malformed TKIP keys that are
shorter than the expected 32-byte layout.

[drop useless length check]

## Remediation

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