CVE-2026-74551

CVE CVE-2026-74551EUVD EUVD-2026-59616Published 2026-08-15T12:27:58.000ZLast changed 2026-08-19T16:38:47.000ZCVSS 7.8

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 53e68c20aeb1e23419bed811aa3a309ceda200f9 <81a6593b1c8dfb2694cd0ce39be01212d2b8436c; patch: 6.12.103; 53e68c20aeb1e23419bed811aa3a309ceda200f9 <51a76bc1b8e717ee3fc0d84f15ac51490ca5f76f; patch: 6.1.183; 53e68c20aeb1e23419bed811aa3a309ceda200f9 <080bbf42faf77e6489ab30d5114c5f8f6ccbb1b8; 53e68c20aeb1e23419bed811aa3a309ceda200f9 <70ad543ce81f368411b6c721265a3b2d7ab4fda4; 53e68c20aeb1e23419bed811aa3a309ceda200f9 <6a2dbce5da2d2163a5b684acf68a0e54582ff0fa; 53e68c20aeb1e23419bed811aa3a309ceda200f9 <2332d35aaf206c17acf848522817252732596676; patch: 6.18.44; patch: 6.6.151; patch: 7.1.8; patch: 0; 5.17; patch: 7.2

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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