---
cve: "CVE-2026-68402"
severity: "HIGH"
cvss: 7.1
epss: "0.3%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-08-10 13:20:33"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T21:59:03+02:00"
---

# CVE-2026-68402

> 7.1 HIGH

## Beschreibung

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

wifi: cfg80211: bound element ID read when checking non-inheritance

cfg80211_is_element_inherited() reads the first data octet of the
candidate element (id = elem->data[0]) to look it up in an extension
non-inheritance list. It does so after testing elem->id, but without
verifying that the element actually has a data octet. A zero-length
extension element (WLAN_EID_EXTENSION with length 0) therefore makes it
read one octet past the end of the element.

_ieee802_11_parse_elems_full() runs this check for every element of a
frame once a non-inheritance context exists -- e.g. while parsing a
per-STA profile of a Multi-Link element in a (re)association response,
or a non-transmitted BSS profile -- so a crafted frame from an AP can
trigger a one-octet slab-out-of-bounds read during element parsing:

  BUG: KASAN: slab-out-of-bounds in cfg80211_is_element_inherited
  Read of size 1 ... in net/wireless/scan.c

Return early (treat the element as inherited) when an extension element
carries no data, mirroring the existing handling of empty ID lists.

The bug was found by fuzzing ieee802_11_parse_elems_full() under KASAN.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Benachbart | warn |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.265
- Kernel ≥ 5.15.216
- Kernel ≥ 6.1.183
- Kernel ≥ 6.6.148
- Kernel ≥ 6.12.101
- Kernel ≥ 6.18.42
- Kernel ≥ 7.1.6

## Referenzen

- <https://git.kernel.org/stable/c/521dd5fe6d12b0d3c275f919738dc3a07117f4a5>
- <https://git.kernel.org/stable/c/24154c172246ae3f0e69bb17c9111095685ceedc>
- <https://git.kernel.org/stable/c/2d31ebb26a14f103c9cdc5287fb20cb2d4bde901>
- <https://git.kernel.org/stable/c/20c308d9a57722801961f816395bf825f7bde6bc>
- <https://git.kernel.org/stable/c/84bd907361c56fbd5523eceb2682cb39da059bd5>
- <https://git.kernel.org/stable/c/11ac7a5e75f5132f1778e0c60981d30dc29fb869>
- <https://git.kernel.org/stable/c/ddf2773bcc8e49a43c561f22ec1e7924215d7947>
- <https://git.kernel.org/stable/c/cb8afea4655ff004fa7feee825d5c79783525383>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-68402) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_