CVE-2025-39891

medium

Description

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().

References

https://git.kernel.org/stable/c/acdf26a912190fc6746e2a890d7d0338190527b4

https://git.kernel.org/stable/c/9eb0118b3470b4d2e4e3bbb1fc088b30c0285d65

https://git.kernel.org/stable/c/9df29aa5637d94d24f7c5f054ef4feaa7b766111

https://git.kernel.org/stable/c/5285b7009dc1e09d5bb9e05fae82e1a807882dbc

https://git.kernel.org/stable/c/32c124c9c03aa755cbaf60ef7f76afd918d47659

https://git.kernel.org/stable/c/0e20450829ca3c1dbc2db536391537c57a40fe0b

https://git.kernel.org/stable/c/06616410a3e5e6cd1de5b7cbc668f1a7edeedad9

https://git.kernel.org/stable/c/05daef0442d28350a1a0d6d0e2cab4a7a91df475

Details

Source: Mitre, NVD

Published: 2025-10-01

Updated: 2025-10-02

Risk Information

CVSS v2

Base Score: 2.1

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N

Severity: Low

CVSS v3

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Severity: Medium

EPSS

EPSS: 0.00024