CVE-2023-52864 — CVE & Security Advisory Radar

🎯 CVE-2023-52864 🇪🇺 EUVD

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CVE-2023-52864 | 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

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.

Klassifikation & Betroffenheit:

Linux Linux 4.15Linux 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 <e0bf076b734a2fab92d8fddc2b8b03462eee7097Linux patch: 4.19.299Linux 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 <cf098e937dd125c0317a0d6f261ac2a950a233d6Linux 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 <fb7b06b59c6887659c6ed0ecd3110835eecbb6a3Linux patch: 5.10.201Linux 44b6b7661132b1b0e5fd3147ded66f1e4a817ca9 <36d85fa7ae0d6be651c1a745191fa7ef055db43eLinux patch: 5.15.139

Improper Restriction of Operations within the Bounds of a Memory Buffer 🎯 High

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

🛡️ Empfohlene Mitigation: Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, many languages that perform their own memory management, such as Java and Perl, are not subject to buffer overflows. Other languages, such as Ada and C#, typically provide overflow prot…

Vollständige Definition bei MITRE ➔

⚔️ Typische Angriffsmuster (CAPEC):

CAPEC-10 · Buffer Overflow via Environment Variable… (High) CAPEC-14 · Client-side Injection-induced Buffer Ove… (High) CAPEC-24 · Filter Failure through Buffer Overflow (High) CAPEC-42 · MIME Conversion (High) CAPEC-44 · Overflow Binary Resource File (Very High) CAPEC-45 · Buffer Overflow via Symbolic Links (High) CAPEC-100 · Overflow Buffers (Very High) CAPEC-123 · Buffer Manipulation (Very High)

🧩 Ähnliche Schwachstellen (Hersteller/Klasse/Score-Band):

CVE-2026-93196 8.4 CVE-2026-93190 8.4 CVE-2026-93063 8.4 CVE-2026-90399 8.4 CVE-2026-90398 8.4

🩹 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

📚 Referenzen & Quellen:

🇪🇺 Original-Eintrag (ENISA EUVD) 🇺🇸 NVD-Eintrag

Ausnutzungs-Zeitleiste:

Reserviert 2023

Veröffentlicht 05/2024

Heute 21.09.

CVSS-Vektor-Analyse: 7.0

AV · Angriffsvektor Lokal

AC · Komplexität Hoch

PR · Privilegien Gering

UI · Interaktion Keine

S · Scope Unverändert

C · Vertraulichkeit Hoch

I · Integrität Hoch

A · Verfügbarkeit Hoch

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

Veröffentlicht:21.05.2024

Aktualisiert:05.08.2026 09:11

Assigner (CNA):Linux

EUVD-ID:EUVD-2023-59577

CWE-119: Memory Corruption ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Kernel-Paket aktualisieren (apt upgrade linux-image / yum update kernel) und System neu starten.

Tier	2026-09-02	2026-09-20
≥90 %	0	489
≥50 %	0	1477
≥10 %	0	0
<10 %	300	0

EPSS

0.3%

CVE-2023-52864 💻 Lokal 🔑 Geringe Nutzerrechte nötig

Linux

CVE-2023-52864 | 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

CWE-119: Memory Corruption ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Kernel-Paket aktualisieren (apt upgrade linux-image / yum update kernel) und System neu starten.

21.05.2024

🛡️ Details ➔

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