CVE-2025-39891

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

• linux linux kernel (>= 3.19 < 5.4.299) • linux linux kernel (>= 5.5 < 5.10.243) • linux linux kernel (>= 5.11 < 5.15.192) • linux linux kernel (>= 5.16 < 6.1.151) • linux linux kernel (>= 6.2 < 6.6.105) • linux linux kernel (>= 6.7 < 6.12.46) • linux linux kernel (>= 6.13 < 6.16.6) • linux linux kernel 6.17 • debian debian linux 11.0