CVE-2025-39891

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> wifi: mwifiex: Initialize the chan_stats array to zero<br /> <br /> The adapter-&gt;chan_stats[] array is initialized in<br /> mwifiex_init_channel_scan_gap() with vmalloc(), which doesn&amp;#39;t zero out<br /> memory. The array is filled in mwifiex_update_chan_statistics()<br /> and then the user can query the data in mwifiex_cfg80211_dump_survey().<br /> <br /> There are two potential issues here. What if the user calls<br /> mwifiex_cfg80211_dump_survey() before the data has been filled in.<br /> Also the mwifiex_update_chan_statistics() function doesn&amp;#39;t necessarily<br /> initialize the whole array. Since the array was not initialized at<br /> the start that could result in an information leak.<br /> <br /> Also this array is pretty small. It&amp;#39;s a maximum of 900 bytes so it&amp;#39;s<br /> more appropriate to use kcalloc() instead vmalloc().