---
cve: "CVE-2023-3439"
severity: "MEDIUM"
cvss: 4.7
epss: "0.3%"
vendor: "n/a"
kev: false
exploited: false
published: "2023-06-28 21:15:10"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T16:05:43+02:00"
---

# CVE-2023-3439

> 4.7 MEDIUM · 🧪 PoC

## Beschreibung

A flaw was found in the MCTP protocol in the Linux kernel. The function mctp_unregister() reclaims the device's relevant resource when a netcard detaches. However, a running routine may be unaware of this and cause the use-after-free of the mdev->addrs object, potentially leading to a denial of service.

## CVSS-Vektor

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

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

## Referenzen

- <https://bugzilla.redhat.com/show_bug.cgi?id=2217915>
- <https://github.com/torvalds/linux/commit/b561275d633bcd8e0e8055ab86f1a13df75a0269>
- <http://www.openwall.com/lists/oss-security/2023/07/02/1>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2023-3439) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_