CVE-2025-38533
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk21th percentile - higher than 21% of all known CVEs
Summary
In the Linux kernel, the libwx network driver has an uninitialized 'dma' field in wx_rx_buffer, potentially causing DMA errors or use-after-free.
Risk Assessment
The organization risks network transmission errors, potentially leading to data loss or system crashes.
Recommendation
Update the Linux kernel to a version that initializes the 'dma' field in wx_rx_buffer.
Original NVD description (English source)
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.