# CVE-2026-90016: staging: rtl8723bs: fix OOB read in rtw_restruct_wmm_ie()

CVE-2026-90016 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-90016, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-90016
- Priority: High
- CVSS: 7.1 (Moderate)
- EPSS: 0.0040
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 16, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-90016

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.113-1 | [DEBIAN-CVE-2026-90016](https://patchblox.com/security/data/fix/linux/debian-cve-2026-90016.md) | Sep 23, 2026 |
| Linux | linux Debian 14 | 7.2.6-1 | [DEBIAN-CVE-2026-90016](https://patchblox.com/security/data/fix/linux/debian-cve-2026-90016.md) | Sep 23, 2026 |
| Linux | linux-6.12 Debian 12.15 (bookworm) | 6.12.113-1~deb12u1 | [DEBIAN-CVE-2026-90016](https://patchblox.com/security/data/fix/linux/debian-cve-2026-90016.md) | Sep 23, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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