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().
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().
Vendor
Product
CWE
Yayın Tarihi
2025-10-01 08:15:31
Güncelleme
2026-01-23 02:32:19
Source Identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
KEV Date Added
-
Kategoriler
Referanslar
https://git.kernel.org/stable/c/05daef0442d28350a1a0d6d0e2cab4a7a91df475
https://git.kernel.org/stable/c/06616410a3e5e6cd1de5b7cbc668f1a7edeedad9
https://git.kernel.org/stable/c/0e20450829ca3c1dbc2db536391537c57a40fe0b
https://git.kernel.org/stable/c/32c124c9c03aa755cbaf60ef7f76afd918d47659
https://git.kernel.org/stable/c/5285b7009dc1e09d5bb9e05fae82e1a807882dbc
https://git.kernel.org/stable/c/9df29aa5637d94d24f7c5f054ef4feaa7b766111
https://git.kernel.org/stable/c/9eb0118b3470b4d2e4e3bbb1fc088b30c0285d65
https://git.kernel.org/stable/c/acdf26a912190fc6746e2a890d7d0338190527b4
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html