---
cve: "CVE-2023-52864"
severity: "HIGH"
cvss: 7.0
epss: "0.3%"
vendor: "Linux"
kev: false
exploited: false
published: "2024-05-21 16:15:23"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T10:06:55+02:00"
---

# CVE-2023-52864

> 7.0 HIGH

## Beschreibung

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

platform/x86: wmi: Fix opening of char device

Since commit fa1f68db6ca7 ("drivers: misc: pass miscdevice pointer via
file private data"), the miscdevice stores a pointer to itself inside
filp->private_data, which means that private_data will not be NULL when
wmi_char_open() is called. This might cause memory corruption should
wmi_char_open() be unable to find its driver, something which can
happen when the associated WMI device is deleted in wmi_free_devices().

Fix the problem by using the miscdevice pointer to retrieve the WMI
device data associated with a char device using container_of(). This
also avoids wmi_char_open() picking a wrong WMI device bound to a
driver with the same name as the original driver.

## CVSS-Vektor

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

## Patch verfügbar (OSV)

- Kernel ≥ 4.19.299
- Kernel ≥ 5.4.261
- Kernel ≥ 5.10.201
- Kernel ≥ 5.15.139
- Kernel ≥ 6.1.63
- Kernel ≥ 6.5.12
- Kernel ≥ 6.6.2

## Referenzen

- <https://git.kernel.org/stable/c/cf098e937dd125c0317a0d6f261ac2a950a233d6>
- <https://git.kernel.org/stable/c/9fb0eed09e1470cd4021ff52b2b9dfcbcee4c203>
- <https://git.kernel.org/stable/c/d426a2955e45a95b2282764105fcfb110a540453>
- <https://git.kernel.org/stable/c/e0bf076b734a2fab92d8fddc2b8b03462eee7097>
- <https://git.kernel.org/stable/c/44a96796d25809502c75771d40ee693c2e44724e>
- <https://git.kernel.org/stable/c/36d85fa7ae0d6be651c1a745191fa7ef055db43e>
- <https://git.kernel.org/stable/c/fb7b06b59c6887659c6ed0ecd3110835eecbb6a3>
- <https://git.kernel.org/stable/c/eba9ac7abab91c8f6d351460239108bef5e7a0b6>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2023-52864) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_