---
cve: "CVE-2026-80954"
severity: "HIGH"
cvss: 7.8
epss: "0.2%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-09-11 20:19:01"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T16:08:41+02:00"
---

# CVE-2026-80954

> 7.8 HIGH

## Beschreibung

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

i3c: Fix unlocked dereference of dev->desc in i3c_device_get_supported_xfer_mode()

i3c_device_get_supported_xfer_mode() uses dev->desc to obtain the
master controller.  However, dev->desc must not be dereferenced unless
bus->lock is held, and this function does not take that lock.

The function only needs access to the master controller associated with
the device's bus.  Use dev->bus instead, which is always valid for the
lifetime of the device and does not require dereferencing dev->desc.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- Kernel ≥ 7.2.4

## Referenzen

- <https://git.kernel.org/stable/c/251db58324ea4792c3f9f692ab09be148e051969>
- <https://git.kernel.org/stable/c/8bed7f4fa710914b7f05fd59998316bfb4d43385>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-80954) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_