---
id: CVE-2026-64446
title: 'staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()

  supplicant_ie is a 256-byte array in struct security_priv. The WPA and
  WPA2 IE copy paths use…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    a94a643a80a84ceb8139061c3d6bf988d75e45a5
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    2131621986c62c86109ce4d84cf73a73757eb8a6
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    6f20d7b0ee47c470734a69379b0fc6647c519603
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    5d7812360abf3143afcbf5efe4ef242448fa1f28
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    46f66c16a95191d9aca07a72ae6b1252a244e26c
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    b9c4bf133c3c47e23baf4f5403b98a953bf58606
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    138cd190efd56ab36c9fdd8fef8749d06937f24b
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    5a752a616e756844388a1a45404db9fc29fec655
  - Linux 4.12
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:38:39.866475Z'
published: '2026-07-25'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:44:52.112Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-64446'
references:
  - url: 'https://git.kernel.org/stable/c/a94a643a80a84ceb8139061c3d6bf988d75e45a5'
  - url: 'https://git.kernel.org/stable/c/2131621986c62c86109ce4d84cf73a73757eb8a6'
  - url: 'https://git.kernel.org/stable/c/6f20d7b0ee47c470734a69379b0fc6647c519603'
  - url: 'https://git.kernel.org/stable/c/5d7812360abf3143afcbf5efe4ef242448fa1f28'
  - url: 'https://git.kernel.org/stable/c/46f66c16a95191d9aca07a72ae6b1252a244e26c'
  - url: 'https://git.kernel.org/stable/c/b9c4bf133c3c47e23baf4f5403b98a953bf58606'
  - url: 'https://git.kernel.org/stable/c/138cd190efd56ab36c9fdd8fef8749d06937f24b'
  - url: 'https://git.kernel.org/stable/c/5a752a616e756844388a1a45404db9fc29fec655'
tags:
  - cve.org
epss: 0.00145
epssPercentile: 0.03806
ingestedAt: '2026-11-06T16:57:43.180Z'
---

## Overview

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

staging: rtl8723bs: fix heap buffer overflow in rtw_cfg80211_set_wpa_ie()

supplicant_ie is a 256-byte array in struct security_priv. The WPA and
WPA2 IE copy paths use:

    memcpy(padapter->securitypriv.supplicant_ie, &pwpa[0], wpa_ielen + 2);

where wpa_ielen is the raw IE length field (u8, 0-255). When a local user
supplies a connect request via nl80211 with a crafted WPA IE of length 255,
wpa_ielen + 2 equals 257, overflowing the 256-byte buffer by one byte into
the adjacent last_mic_err_time field.

rtw_parse_wpa_ie() does not prevent this: its length consistency check
compares *(wpa_ie+1) against (u8)(wpa_ie_len-2), which is (u8)(255) == 255
when wpa_ie_len = 257, so the check passes silently.

Add explicit bounds checks for both the WPA and WPA2 paths before the
memcpy, rejecting any IE whose total size (wpa_ielen + 2) exceeds the
supplicant_ie buffer.

## Affected

- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < a94a643a80a84ceb8139061c3d6bf988d75e45a5`
- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 2131621986c62c86109ce4d84cf73a73757eb8a6`
- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 6f20d7b0ee47c470734a69379b0fc6647c519603`
- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 5d7812360abf3143afcbf5efe4ef242448fa1f28`
- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 46f66c16a95191d9aca07a72ae6b1252a244e26c`
- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < b9c4bf133c3c47e23baf4f5403b98a953bf58606`
- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 138cd190efd56ab36c9fdd8fef8749d06937f24b`
- `Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b < 5a752a616e756844388a1a45404db9fc29fec655`
- `Linux 4.12`

## Remediation

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