IT

Tracker / CVE-2025-39891

CVE-2025-39891

High 7.1

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().

Affected products and versions

debian debian_linux
linux linux_kernel
linux linux_kernel · 3.19 → 5.4.299
linux linux_kernel · 5.11 → 5.15.192
linux linux_kernel · 5.16 → 6.1.151
linux linux_kernel · 5.5 → 5.10.243
linux linux_kernel · 6.13 → 6.16.6
linux linux_kernel · 6.2 → 6.6.105
linux linux_kernel · 6.7 → 6.12.46

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References