Answer in brief
CVE-2025-39891 records a High severity (CVSS 7.1) vulnerability in wifi: mwifiex: Initialize the chan_stats array to zero. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=bf35443314acb43fa8a3f9f8046e14cbe178762b <9eb0118b3470b4d2e4e3bbb1fc088b30c0285d65 || >=bf35443314acb43fa8a3f9f8046e14cbe178762b <05daef0442d28350a1a0d6d0e2cab4a7a91df475 || >=bf35443314acb43fa8a3f9f8046e14cbe178762b <acdf26a912190fc6746e2a890d7d0338190527b4 || >=bf35443314acb43fa8a3f9f8046e14cbe178762b <32c124c9c03aa755cbaf60ef7f76afd918d47659 || >=bf35443314acb43fa8a3f9f8046e14cbe178762b <9df29aa5637d94d24f7c5f054ef4feaa7b766111 || >=bf35443314acb43fa8a3f9f8046e14cbe178762b <06616410a3e5e6cd1de5b7cbc668f1a7edeedad9 || >=bf35443314acb43fa8a3f9f8046e14cbe178762b <5285b7009dc1e09d5bb9e05fae82e1a807882dbc || >=bf35443314acb43fa8a3f9f8046e14cbe178762b <0e20450829ca3c1dbc2db536391537c57a40fe0b | 9eb0118b3470b4d2e4e3bbb1fc088b30c0285d65, 05daef0442d28350a1a0d6d0e2cab4a7a91df475, acdf26a912190fc6746e2a890d7d0338190527b4, 32c124c9c03aa755cbaf60ef7f76afd918d47659, 9df29aa5637d94d24f7c5f054ef4feaa7b766111, 06616410a3e5e6cd1de5b7cbc668f1a7edeedad9, 5285b7009dc1e09d5bb9e05fae82e1a807882dbc, 0e20450829ca3c1dbc2db536391537c57a40fe0b |
| Linux/Linuxgeneric | 3.19 | Not reported |
Published upstream
Oct 1, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 28, 2026
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().
Quoted source text, attributed separately from HOL analysis.