{"apiVersion":"1.0","identifier":"CVE-2026-74551","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.","publishedAt":"2026-08-15T13:18:00","lastModifiedAt":"2026-08-19T17:21:10","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74551","cvssScore":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.00129,"riskScore":0.79,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74551","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74551","en":"https://www.redsauce.net/en/cves/CVE-2026-74551","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74551","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74551","de":"https://www.redsauce.net/de/cves/CVE-2026-74551","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74551","el":"https://www.redsauce.net/el/cves/CVE-2026-74551"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74551"}}