CVE-2026-74551
The CVE Severity Digest turns the National Vulnerability Database feed into a prioritized security briefing. It groups affected software into practical product families, distinguishes patch and mitigation references from general citations, and ranks the vulnerabilities most likely to matter to technology operators while preserving direct links to the official record.
- CVE
- 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.
- Published
- 08/15/2026
- Severity
- UNKNOWN
- CVSS
- —
- Priority score
- 19.952