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ReviewHigh

CVE-2026-74551

Linux

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_DM...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.08.15
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

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_DM...

Affected product and versions

Product
Linux
Affected versions
>= 53e68c20aeb1e23419bed811aa3a309ceda200f9 < 81a6593b1c8dfb2694cd0ce39be01212d2b8436c, >= 53e68c20aeb1e23419bed811aa3a309ceda200f9 < 70ad543ce81f368411b6c721265a3b2d7ab4fda4, >= 53e68c20aeb1e23419bed811aa3a309ceda200f9 < 51a76bc1b8e717ee3fc0d84f15ac51490ca5f76f, >= 53e68c20aeb1e23419bed811aa3a309ceda200f9 < 2332d35aaf206c17acf848522817252732596676, >= 53e68c20aeb1e23419bed811aa3a309ceda200f9 < 6a2dbce5da2d2163a5b684acf68a0e54582ff0fa, >= 53e68c20aeb1e23419bed811aa3a309ceda200f9 < 080bbf42faf77e6489ab30d5114c5f8f6ccbb1b8, >= 5.17
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available