---
cve: "CVE-2026-63832"
severity: "HIGH"
cvss: 8.8
epss: "22%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-07-19 12:02:24"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-17T10:51:46+02:00"
---

# CVE-2026-63832

> 8.8 HIGH

## Beschreibung

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

wifi: mt76: add wcid publish check in mt76_sta_add

Since mt7925_mac_sta_add publishes wcid, add publish check in mt76_sta_add
to avoid reinitializing the wcid->poll_list.

Found dev->sta_poll_list corruption when using mt7925 and 7.1-rc4.
According to the corruption information, prev->next was changed to itself.

wlan0: disconnect from AP 90:fb:5d:94:8b:e3 for new auth to 90:fb:5d:94:8b:e2
wlan0: authenticate with 90:fb:5d:94:8b:e2 (local address=84:9e:56:9c:7e:6b)
wlan0: send auth to 90:fb:5d:94:8b:e2 (try 1/3)
 slab kmalloc-8k start ffff8c80958a6000 pointer offset 4160 size 8192
list_add corruption. prev->next should be next (ffff8c808a7488f8), but was ffff8c80958a7040. (prev=ffff8c80958a7040).

 mt76_wcid_add_poll+0x95/0xd0 [mt76]
 mt7925_mac_add_txs.part.0+0xa5/0xe0 [mt7925_common]
 mt7925_rx_check+0xa7/0xc0 [mt7925_common]
 mt76_dma_rx_poll+0x50d/0x790 [mt76]
 mt792x_poll_rx+0x52/0xe0 [mt792x_lib]

## CVSS-Vektor

```
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 6.18.38
- Kernel ≥ 7.1.3

## Referenzen

- <https://git.kernel.org/stable/c/3c499851753a24d2e148d4e9ca51764c0c51554e>
- <https://git.kernel.org/stable/c/55e014aaec650ede08b693ba59c8d0443f13f11c>
- <https://git.kernel.org/stable/c/20b126920a259df4d7dcae19fcfe2c57a74d6b2e>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-63832) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_