CVE-2025-39952

In the Linux kernel, the following vulnerability has been resolved:

wifi: wilc1000: avoid buffer overflow in WID string configuration

Fix the following copy overflow warning identified by Smatch checker.

drivers/net/wireless/microchip/wilc1000/wlan_cfg.c:184 wilc_wlan_parse_response_frame() error: '__memcpy()' 'cfg->s[i]->str' copy overflow (512 vs 65537)

This patch introduces size check before accessing the memory buffer. The checks are base on the WID type of received data from the firmware. For WID string configuration, the size limit is determined by individual element size in 'struct wilc_cfg_str_vals' that is maintained in 'len' field of 'struct wilc_cfg_str'.

This flaw poses no operational impact on Red Hat Enterprise Linux as the affected Microchip WILC1000 wireless driver is neither compiled nor distributed in supported Red Hat kernels. The underlying memory copying vulnerability is triggered only when handling configuration responses from specific Wi-Fi device firmware that is not supported or present in enterprise installations. Therefore, supported deployments are inherently not affected by this issue under standard configurations.