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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未初始化chan_stats数组，可能导致信息泄露。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux bf35443314acb43fa8a3f9f8046e14cbe178762b< 9eb0118b3470b4d2e4e3bbb1fc088b30c0285d65 affected
bf35443314acb43fa8a3f9f8046e14cbe178762b< 05daef0442d28350a1a0d6d0e2cab4a7a91df475 affected
bf35443314acb43fa8a3f9f8046e14cbe178762b< acdf26a912190fc6746e2a890d7d0338190527b4 affected
bf35443314acb43fa8a3f9f8046e14cbe178762b< 32c124c9c03aa755cbaf60ef7f76afd918d47659 affected
bf35443314acb43fa8a3f9f8046e14cbe178762b< 9df29aa5637d94d24f7c5f054ef4feaa7b766111 affected
bf35443314acb43fa8a3f9f8046e14cbe178762b< 06616410a3e5e6cd1de5b7cbc668f1a7edeedad9 affected
bf35443314acb43fa8a3f9f8046e14cbe178762b< 5285b7009dc1e09d5bb9e05fae82e1a807882dbc affected
bf35443314acb43fa8a3f9f8046e14cbe178762b< 0e20450829ca3c1dbc2db536391537c57a40fe0b affected
… +10 more rows
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I. Basic Information for CVE-2025-39891

Vulnerability Information
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Vulnerability Title
wifi: mwifiex: Initialize the chan_stats array to zero
Source: CVE Program / CVE List V5
Vulnerability 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().
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未初始化chan_stats数组，可能导致信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux bf35443314acb43fa8a3f9f8046e14cbe178762b ~ 9eb0118b3470b4d2e4e3bbb1fc088b30c0285d65 -
Linux Linux 3.19 -

II. Public POCs for CVE-2025-39891

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III. Intelligence Information for CVE-2025-39891

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Patches & Fixes for CVE-2025-39891 (2)

Same Patch Batch · Linux · 2025-10-01 · 169 CVEs total

CVE-2023-53517 9.8 CRITICAL tipc: do not update mtu if msg_max is too small in mtu negotiation
CVE-2025-39919 8.8 HIGH wifi: mt76: mt7996: add missing check for rx wcid entries
CVE-2025-39918 8.8 HIGH wifi: mt76: fix linked list corruption
CVE-2023-53454 8.8 HIGH HID: multitouch: Correct devm device reference for hidinput input_dev name
CVE-2022-50442 8.4 HIGH fs/ntfs3: Validate buffer length while parsing index
CVE-2023-53493 8.4 HIGH accel/qaic: tighten bounds checking in decode_message()
CVE-2023-53492 7.8 HIGH netfilter: nf_tables: do not ignore genmask when looking up chain by id
CVE-2025-39924 7.8 HIGH erofs: fix invalid algorithm for encoded extents
CVE-2023-53510 7.8 HIGH scsi: ufs: core: Fix handling of lrbp->cmd
CVE-2025-39927 7.8 HIGH ceph: fix race condition validating r_parent before applying state
CVE-2022-50421 7.8 HIGH rpmsg: char: Avoid double destroy of default endpoint
CVE-2023-53506 7.8 HIGH udf: Do not bother merging very long extents
CVE-2022-50423 7.8 HIGH ACPICA: Fix use-after-free in acpi_ut_copy_ipackage_to_ipackage()
CVE-2023-53504 7.8 HIGH RDMA/bnxt_re: Properly order ib_device_unalloc() to avoid UAF
CVE-2023-53495 7.8 HIGH net: ethernet: mvpp2_main: fix possible OOB write in mvpp2_ethtool_get_rxnfc()
CVE-2023-53494 7.8 HIGH crypto: xts - Handle EBUSY correctly
CVE-2022-50437 7.8 HIGH drm/msm/hdmi: fix memory corruption with too many bridges
CVE-2023-53478 7.8 HIGH tracing/synthetic: Fix races on freeing last_cmd
CVE-2023-53481 7.8 HIGH ubi: ubi_wl_put_peb: Fix infinite loop when wear-leveling work failed
CVE-2023-53486 7.8 HIGH fs/ntfs3: Enhance the attribute size check

Showing top 20 of 169 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-39891

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