---
cve: "CVE-2026-80735"
severity: "HIGH"
cvss: 7.3
epss: "24.2%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-09-03 13:06:12"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T14:57:47+02:00"
---

# CVE-2026-80735

> 7.3 HIGH

## Beschreibung

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

ovpn: ensure socket is owned by ovpn before deref sk_user_data

Some subsystems, like BPF SOCKMAP, set sk_user_data without
actually setting the encap_type.

For this reason, we must make sure that the type is the
one ovpn expects before dereferencing sk_user_data.

Failing to do so may lead to out-of-bounds reads.

## CVSS-Vektor

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

| 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 | Gering | warn |

## Patch verfügbar (OSV)

- Kernel ≥ 6.18.45
- Kernel ≥ 7.1.9

## Referenzen

- <https://git.kernel.org/stable/c/43a31142e1d22b3cf5490bd94a94db7196901734>
- <https://git.kernel.org/stable/c/59aed1eb60d70678a53acccb0cb337a26ce6680e>
- <https://git.kernel.org/stable/c/61fb3cca40ff938671474f4a16adb908c19032d7>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-80735) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_