Slab-Out-of-Bounds Vulnerability in Linux Kernel's rtl8xxxu Driver

CVE-2025-71234

What is CVE-2025-71234?

A vulnerability exists in the Linux kernel's rtl8xxxu driver, where an incorrect allocation of memory for private station data leads to a slab-out-of-bounds write. This issue arises due to the driver not setting 'hw->sta_data_size', resulting in insufficient space being allocated for the driver’s private data during the connection of a station. This can potentially allow for exploitation in systems utilizing the RTL8192EU adapter, as demonstrated in KASAN reports on the VisionFive 2 board. The kernel must ensure adequate memory allocation by configuring 'hw->sta_data_size' appropriately, enhancing system integrity and security.

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