High 7.1Published Oct 1, 2025

CVE-2025-39891wifi: mwifiex: Initialize the chan_stats array to zero

Updated under an hour ago (Oct 28, 2026, 2:10 AM ET)

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It affects Linux and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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().

CVSS: 7.1 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 19, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from bf35443314acb43fa8a3f9f8046e14cbe178762b before 9eb0118b3470b4d2e4e3bbb1fc088b30c0285d65; from bf35443314acb43fa8a3f9f8046e14cbe178762b before 05daef0442d28350a1a0d6d0e2cab4a7a91df475; from bf35443314acb43fa8a3f9f8046e14cbe178762b before acdf26a912190fc6746e2a890d7d0338190527b4; from bf35443314acb43fa8a3f9f8046e14cbe178762b before 32c124c9c03aa755cbaf60ef7f76afd918d47659; from bf35443314acb43fa8a3f9f8046e14cbe178762b before 9df29aa5637d94d24f7c5f054ef4feaa7b766111; from bf35443314acb43fa8a3f9f8046e14cbe178762b before 06616410a3e5e6cd1de5b7cbc668f1a7edeedad9; from bf35443314acb43fa8a3f9f8046e14cbe178762b before 5285b7009dc1e09d5bb9e05fae82e1a807882dbc; from bf35443314acb43fa8a3f9f8046e14cbe178762b before 0e20450829ca3c1dbc2db536391537c57a40fe0b	CNA record
linux linux_kernel linux:linux_kernel	from 3.19 before 5.4.299; from 5.5 before 5.10.243; from 5.11 before 5.15.192; from 5.16 before 6.1.151; from 6.2 before 6.6.105; from 6.7 before 6.12.46; from 6.13 before 6.16.6; 6.17; and 3 more ranges	NVD
debian debian_linux debian:debian_linux	11.0	NVD

References

References

https://git.kernel.org/stable/c/9eb0118b3470b4d2e4e3bbb1fc088b30c0285d65	patch
https://git.kernel.org/stable/c/05daef0442d28350a1a0d6d0e2cab4a7a91df475	patch
https://git.kernel.org/stable/c/acdf26a912190fc6746e2a890d7d0338190527b4	patch
https://git.kernel.org/stable/c/32c124c9c03aa755cbaf60ef7f76afd918d47659	patch
https://git.kernel.org/stable/c/9df29aa5637d94d24f7c5f054ef4feaa7b766111	patch
https://git.kernel.org/stable/c/06616410a3e5e6cd1de5b7cbc668f1a7edeedad9	patch
https://git.kernel.org/stable/c/5285b7009dc1e09d5bb9e05fae82e1a807882dbc	patch
https://git.kernel.org/stable/c/0e20450829ca3c1dbc2db536391537c57a40fe0b	patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	mailing-list, third-party-advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	mailing-list, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.