---
title: "CVE-2026-90018: Linux kernel rtl8723bs - Buffer Overflow"
description: "Linux kernel staging rtl8723bs contains a stack buffer overflow and heap out-of-bounds read caused by missing length validation in rtw_get_wps_attr() when parsing WPS attributes in wireless management frames, letting remote attackers via crafted WPS IE in beacon or probe response cause stack corruption, exploit requires crafted wireless management frames."
url: https://panop.io/threat-heartbeat/CVE-2026-90018/
---

# CVE-2026-90018 Linux kernel rtl8723bs - Buffer Overflow

Linux kernel staging rtl8723bs contains a stack buffer overflow and heap out-of-bounds read caused by missing length validation in rtw\_get\_wps\_attr() when parsing WPS attributes in wireless management frames, letting remote attackers via crafted WPS IE in beacon or probe response cause stack corruption, exploit requires crafted wireless management frames.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.52% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90018)

## Details

Type

Buffer Overflow

Impact

Remote Code Execution, Denial Of Service

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

16 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for rtl8723bs rtw\_get\_wps\_attr() vulnerability.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-90018](https://nvd.nist.gov/vuln/detail/CVE-2026-90018)
- [https://git.kernel.org/stable/c/a53d1ac9ce63db07943b2b2248111003851fb00f](https://git.kernel.org/stable/c/a53d1ac9ce63db07943b2b2248111003851fb00f)
- [https://git.kernel.org/stable/c/fd5e24ea8373347d0352f153a66e8647337d1b10](https://git.kernel.org/stable/c/fd5e24ea8373347d0352f153a66e8647337d1b10)
- [https://git.kernel.org/stable/c/ff61aa3289355dafa811550a1764691cd1f5d33b](https://git.kernel.org/stable/c/ff61aa3289355dafa811550a1764691cd1f5d33b)
- [https://git.kernel.org/stable/c/34f51d196c43a42046d229de5e79025d5ca553ca](https://git.kernel.org/stable/c/34f51d196c43a42046d229de5e79025d5ca553ca)
- [https://git.kernel.org/stable/c/3a6457ebf39080b87c712657fdb38f34a24fc3ff](https://git.kernel.org/stable/c/3a6457ebf39080b87c712657fdb38f34a24fc3ff)
- [https://git.kernel.org/stable/c/931640dfcb8cfa08f6cfb46229716d8072356420](https://git.kernel.org/stable/c/931640dfcb8cfa08f6cfb46229716d8072356420)
- [https://git.kernel.org/stable/c/99aa998dec83ba180822f70e6d48a514fc81c20d](https://git.kernel.org/stable/c/99aa998dec83ba180822f70e6d48a514fc81c20d)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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