---
cve: "CVE-2026-80935"
severity: "HIGH"
cvss: 8.8
epss: "24%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-09-11 20:18:57"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-17T23:31:28+02:00"
---

# CVE-2026-80935

> 8.8 HIGH

## Beschreibung

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

wifi: mt76: mt7996: bound the device EEPROM address before the EFUSE copy

mt7996_mcu_get_eeprom() derives the destination of the EFUSE/EXT block
copy from the address reported by the MCU response (event->addr, a
device-controlled __le32) and clamps only the copy length, never the
destination offset into dev->mt76.eeprom.data. A malicious or
malfunctioning device can report an arbitrary address and drive an
out-of-bounds write of up to MT7996_EXT_EEPROM_BLOCK_SIZE bytes past
eeprom.data.

Reject a response whose address would place the copy outside eeprom.data
before deriving the destination pointer. Devices that echo the requested
in-bounds offset are unaffected.

## 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 ≥ 6.18.52
- Kernel ≥ 7.2.4

## Referenzen

- <https://git.kernel.org/stable/c/9e5abb5e2ade0b6fd0e47209711115d47a255176>
- <https://git.kernel.org/stable/c/6be59da2063d5b3522bfde8aae0487ec095eb384>
- <https://git.kernel.org/stable/c/13b3c29a782033ce4a230be9e5618032813dbcd4>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-80935) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_