CVE-2026-74551 — CVE & Security Advisory Radar

🎯 CVE-2026-74551 HIGH 7.8 🔥 EPSS 13% 🇪🇺 EUVD

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CVE-2026-74551 | In the Linux kernel, the following vulnerability has been resolved: hwmon: (nzxt-smart2) DMA-align output buffer Sashiko reports: When send_output_report() calls hid_hw_output_report(), the underlying USB HID core calls usb_interrupt_msg() which maps this buffer directly for DMA. When the DMA mapping flushes or invalidates the cacheline, it will corrupt the adjacent variables (mutex, update_interval) that were modified concurrently by the CPU. This causes

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

hwmon: (nzxt-smart2) DMA-align output buffer

Sashiko reports:

When send_output_report() calls hid_hw_output_report(), the underlying USB
HID core calls usb_interrupt_msg() which maps this buffer directly for DMA.

When the DMA mapping flushes or invalidates the cacheline, it will corrupt
the adjacent variables (mutex, update_interval) that were modified
concurrently by the CPU. This causes memory corruption due to cacheline
sharing on non-coherent CPU architectures (such as ARM or MIPS). The DMA
API debugging tool (CONFIG_DMA_API_DEBUG) will trigger runtime warnings
for this violation.

Any operation that triggers send_output_report() (like setting a fan speed
or updating the interval) causes the USB DMA mapping. On systems with
non-coherent caches, this structural bug causes immediate and deterministic
memory corruption.

Align the output buffer to ARCH_DMA_MINALIGN to fix the problem.

Klassifikation & Betroffenheit:

Linux Linux 53e68c20aeb1e23419bed811aa3a309ceda200f9 <81a6593b1c8dfb2694cd0ce39be01212d2b8436cLinux patch: 6.12.103Linux 53e68c20aeb1e23419bed811aa3a309ceda200f9 <51a76bc1b8e717ee3fc0d84f15ac51490ca5f76fLinux patch: 6.1.183Linux 53e68c20aeb1e23419bed811aa3a309ceda200f9 <080bbf42faf77e6489ab30d5114c5f8f6ccbb1b8Linux 53e68c20aeb1e23419bed811aa3a309ceda200f9 <70ad543ce81f368411b6c721265a3b2d7ab4fda4Linux 53e68c20aeb1e23419bed811aa3a309ceda200f9 <6a2dbce5da2d2163a5b684acf68a0e54582ff0faLinux 53e68c20aeb1e23419bed811aa3a309ceda200f9 <2332d35aaf206c17acf848522817252732596676

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-2026-74573 9.3 CVE-2026-74568 9.3 CVE-2026-74517 9.3 CVE-2026-74439 9.3 CVE-2026-74310 9.3

🩹 Patch verfügbar (OSV):

🩹 Kernel ≥ 6.1.183 🩹 Kernel ≥ 6.6.151 🩹 Kernel ≥ 6.12.103 🩹 Kernel ≥ 6.18.44 🩹 Kernel ≥ 7.1.8

📚 Referenzen & Quellen:

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

Ausnutzungs-Zeitleiste:

Reserviert 2026

Veröffentlicht 08/2026

Heute 07.09.

CVSS-Vektor-Analyse: 7.8

AV · Angriffsvektor Lokal

AC · Komplexität Gering

PR · Privilegien Gering

UI · Interaktion Keine

S · Scope Unverändert

C · Vertraulichkeit Hoch

I · Integrität Hoch

A · Verfügbarkeit Hoch

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

Veröffentlicht:15.08.2026

Aktualisiert:19.08.2026 17:21

Assigner (CNA):Linux

EUVD-ID:EUVD-2026-59616

Quellen: 🇪🇺 EUVD-Datenbank (ENISA) + 🇺🇸 NVD-Anreicherung · 24-h-Cache

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

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

Tier	2026-08-29	2026-09-06
≥90 %	4	0
≥50 %	4	0
≥10 %	3	0
<10 %	304	300

7.8 HIGH

🇪🇺 EUVD

EPSS

13%

CVE-2026-74551 💻 Lokal 🔑 Geringe Nutzerrechte nötig

Linux

CVE-2026-74551 | In the Linux kernel, the following vulnerability has been resolved: hwmon: (nzxt-smart2) DMA-align output buffer Sashiko reports: When send_output_report() calls hid_hw_output_report(), the underlying USB HID core calls usb_interrupt_msg() which maps this buffer directly for DMA. When the DMA mapping flushes or invalidates the cacheline, it will corrupt the adjacent variables (mutex, update_interval) that were modified concurrently by the CPU. This causes

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

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

15.08.2026

🛡️ Details ➔

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