CVE-2025-39891
Vulnerability Scoring
Analysis In Progress
CVE-2025-39891 Vulnerability Analysis & Exploit Details
CVE-2025-39891
Attack Complexity Details
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Attack Complexity:
Attack Complexity Analysis In Progress
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Attack Vector:
Attack Vector Under Analysis
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Privileges Required:
None
No authentication is required for exploitation.
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Scope:
Impact is confined to the initially vulnerable component.
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User Interaction:
None
No user interaction is necessary for exploitation.
CVE-2025-39891 Details
Status: Awaiting Analysis
Last updated: 🕖 02 Oct 2025, 19:12 UTC
Originally published on: 🕗 01 Oct 2025, 08:15 UTC
Time between publication and last update: 1 days
CVSS Release:
CVE-2025-39891 Vulnerability Summary
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().
Assessing the Risk of CVE-2025-39891
Access Complexity Graph
The exploitability of CVE-2025-39891 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).
Exploitability Analysis for CVE-2025-39891
No exploitability data is available for CVE-2025-39891.
Understanding AC and PR
A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.
Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.
Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.
CVSS Score Breakdown Chart
Above is the CVSS Sub-score Breakdown for CVE-2025-39891, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.
CIA Impact Analysis
Below is the Impact Analysis for CVE-2025-39891, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.
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Confidentiality:
None
CVE-2025-39891 does not compromise confidentiality.
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Integrity:
None
CVE-2025-39891 does not impact data integrity.
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Availability:
None
CVE-2025-39891 does not affect system availability.
CVE-2025-39891 References
External References
- 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
CWE Common Weakness Enumeration
Unknown
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