---
id: CVE-2026-90016
title: "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix OOB read in rtw_restruct_wmm_ie()\n\nrtw_restruct_wmm_ie() scans in_ie for a WMM IE with:\n\n\twhile (i < in_len) {\n\t\t...\n\t\tif (i + 5 < in_len && in_…"
summary: "In the Linux kernel, the following vulnerability has been resolved:\n\nstaging: rtl8723bs: fix OOB read in rtw_restruct_wmm_ie()\n\nrtw_restruct_wmm_ie() scans in_ie for a WMM IE with:\n\n\twhile (i < in_len) {\n\t\t...\n\t\tif (i + 5 < in_len && in_…"
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    4420cc71841b50e31a7868ef7acb011c0e08d294
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    fd19b8895f8a91087e8a62f1e27b128025dabb95
  - >-
    Linux >= 554c0a3abf216c991c5ebddcdb2c08689ecd290b <
    28a289beaf226b30b1e6e7d7b1a2946fe2d6e852
  - Linux 4.12
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T15:18:25.227'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90016'
references:
  - url: 'https://git.kernel.org/stable/c/28a289beaf226b30b1e6e7d7b1a2946fe2d6e852'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4420cc71841b50e31a7868ef7acb011c0e08d294'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fd19b8895f8a91087e8a62f1e27b128025dabb95'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.939Z'
epss: 0.00353
epssPercentile: 0.26264
---

## Overview

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

staging: rtl8723bs: fix OOB read in rtw_restruct_wmm_ie()

rtw_restruct_wmm_ie() scans in_ie for a WMM IE with:

	while (i < in_len) {
		...
		if (i + 5 < in_len && in_ie[i] == 0xDD && ...) {
			...
			break;
		}
		i += (in_ie[i + 1] + 2); /* to the next IE element */
	}

When the "i + 5 < in_len" match check fails simply because i is
within 5 bytes of the end of the buffer (i.e. no WMM IE was found
near the tail of in_ie), execution falls through to
"i += (in_ie[i + 1] + 2)", which reads in_ie[i + 1]. If i == in_len
- 1 at that point, this is a 1-byte out-of-bounds read of an
attacker-influenced IE buffer built from association/scan data.

Commit a75281626fc8f ("staging: rtl8723bs: fix potential
out-of-bounds read in rtw_restruct_wmm_ie") added the "i + 5 <
in_len" guard to the match condition itself, but did not add an
equivalent guard before the fallthrough advance, so the same class
of OOB read remained reachable through the non-matching path.

Add an explicit bounds check before advancing to the next IE.

## Remediation

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