CVE-2025-38533: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: net: libwx: fix the using of Rx buffer DMA The wx_rx_buffer structure contained two DMA address fields: 'dma' and 'page_dma'. However, only 'page_dma' was actually initialized and used to program the Rx descriptor. But 'dma' was uninitialized and used in some paths. This could lead to undefined behavior, including DMA errors or use-after-free, if the uninitialized 'dma' was used. Althrough such error has not yet occurred, it is worth fixing in the code.

Affected products

• Linux Linux Kernel: from 6.3, before 6.6.100 (fixed in 6.6.100); from 6.7, before 6.12.40 (fixed in 6.12.40); from 6.13, before 6.15.8 (fixed in 6.15.8); version 6.16 only

Published 2025-08-16. Last modified 2026-07-30.