7.8
HIGH
CVSS 3.1
CVE-2026-74551
hwmon: (nzxt-smart2) DMA-align output buffer
Overview
Description
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.
Details
INFO
Published Date :
Aug. 15, 2026, 1:18 p.m.
Last Modified :
Aug. 19, 2026, 5:21 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
Align the output buffer to DMA requirements to prevent memory corruption.
- Align the output buffer to ARCH_DMA_MINALIGN.
- Ensure DMA mapping flushes do not corrupt adjacent variables.
- Test on non-coherent CPU architectures after applying fix.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-74551.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74551 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-74551
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-74551 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74551 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 19, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/81a6593b1c8dfb2694cd0ce39be01212d2b8436c Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '70ad543ce81f368411b6c721265a3b2d7ab4fda4', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '51a76bc1b8e717ee3fc0d84f15ac51490ca5f76f', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '2332d35aaf206c17acf848522817252732596676', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '6a2dbce5da2d2163a5b684acf68a0e54582ff0fa', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '080bbf42faf77e6489ab30d5114c5f8f6ccbb1b8', 'versionType': 'git'}], 'programFiles': ['drivers/hwmon/nzxt-smart2.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/hwmon/nzxt-smart2.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '81a6593b1c8dfb2694cd0ce39be01212d2b8436c', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '70ad543ce81f368411b6c721265a3b2d7ab4fda4', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '51a76bc1b8e717ee3fc0d84f15ac51490ca5f76f', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '2332d35aaf206c17acf848522817252732596676', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '6a2dbce5da2d2163a5b684acf68a0e54582ff0fa', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '080bbf42faf77e6489ab30d5114c5f8f6ccbb1b8', 'versionType': 'git'}], 'programFiles': ['drivers/hwmon/nzxt-smart2.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.183', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/hwmon/nzxt-smart2.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '70ad543ce81f368411b6c721265a3b2d7ab4fda4', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '51a76bc1b8e717ee3fc0d84f15ac51490ca5f76f', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '2332d35aaf206c17acf848522817252732596676', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '6a2dbce5da2d2163a5b684acf68a0e54582ff0fa', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '080bbf42faf77e6489ab30d5114c5f8f6ccbb1b8', 'versionType': 'git'}], 'programFiles': ['drivers/hwmon/nzxt-smart2.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/hwmon/nzxt-smart2.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '70ad543ce81f368411b6c721265a3b2d7ab4fda4', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '51a76bc1b8e717ee3fc0d84f15ac51490ca5f76f', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '2332d35aaf206c17acf848522817252732596676', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '6a2dbce5da2d2163a5b684acf68a0e54582ff0fa', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '080bbf42faf77e6489ab30d5114c5f8f6ccbb1b8', 'versionType': 'git'}], 'programFiles': ['drivers/hwmon/nzxt-smart2.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/hwmon/nzxt-smart2.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '70ad543ce81f368411b6c721265a3b2d7ab4fda4', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '51a76bc1b8e717ee3fc0d84f15ac51490ca5f76f', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '2332d35aaf206c17acf848522817252732596676', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '6a2dbce5da2d2163a5b684acf68a0e54582ff0fa', 'versionType': 'git'}, {'status': 'affected', 'version': '53e68c20aeb1e23419bed811aa3a309ceda200f9', 'lessThan': '080bbf42faf77e6489ab30d5114c5f8f6ccbb1b8', 'versionType': 'git'}], 'programFiles': ['drivers/hwmon/nzxt-smart2.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/hwmon/nzxt-smart2.c'], 'defaultStatus': 'affected'}] Added Description 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. Added Reference https://git.kernel.org/stable/c/080bbf42faf77e6489ab30d5114c5f8f6ccbb1b8 Added Reference https://git.kernel.org/stable/c/2332d35aaf206c17acf848522817252732596676 Added Reference https://git.kernel.org/stable/c/51a76bc1b8e717ee3fc0d84f15ac51490ca5f76f Added Reference https://git.kernel.org/stable/c/6a2dbce5da2d2163a5b684acf68a0e54582ff0fa Added Reference https://git.kernel.org/stable/c/70ad543ce81f368411b6c721265a3b2d7ab4fda4
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.