---
cve: "CVE-2025-40301"
severity: "HIGH"
cvss: 7.6
epss: "27%"
vendor: "Linux"
kev: false
exploited: false
published: "2025-12-08 01:16:02"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T11:03:13+02:00"
---

# CVE-2025-40301

> 7.6 HIGH

## Beschreibung

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

Bluetooth: hci_event: validate skb length for unknown CC opcode

In hci_cmd_complete_evt(), if the command complete event has an unknown
opcode, we assume the first byte of the remaining skb->data contains the
return status. However, parameter data has previously been pulled in
hci_event_func(), which may leave the skb empty. If so, using skb->data[0]
for the return status uses un-init memory.

The fix is to check skb->len before using skb->data.

## CVSS-Vektor

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

## Patch verfügbar (OSV)

- Kernel ≥ 6.1.159
- Kernel ≥ 6.6.117
- Kernel ≥ 6.12.58
- Kernel ≥ 6.17.8

## Referenzen

- <https://git.kernel.org/stable/c/fea895de78d3bb2f0c09db9f10b18f8121b15759>
- <https://git.kernel.org/stable/c/779f83a91d4f1bf5ddfeaf528420cbb6dbf03fa8>
- <https://git.kernel.org/stable/c/cf2c2acec1cf456c3d11c11a7589e886a0f963a9>
- <https://git.kernel.org/stable/c/1a0ddaaf97405dbd11d4cb5a961a3f82400e8a50>
- <https://git.kernel.org/stable/c/5c5f1f64681cc889d9b13e4a61285e9e029d6ab5>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-40301) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_