Linux Kernel up to 6.6.107/6.12.48/6.16.8 wifi wlan_cfg.c wilc_wlan_parse_response_frame len buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.6.107/6.12.48/6.16.8. Affected by this vulnerability is the function wilc_wlan_parse_response_frame of the file drivers/net/wireless/microchip/wilc1000/wlan_cfg.c of the component wifi. The manipulation of the argument len leads to buffer overflow. This vulnerability is documented as CVE-2025-39952. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.6.107/6.12.48/6.16.8. It has been rated as critical. This issue affects the function wilc_wlan_parse_response_frame of the file drivers/net/wireless/microchip/wilc1000/wlan_cfg.c of the component wifi. The manipulation of the argument len with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: wifi: wilc1000: avoid buffer overflow in WID string configuration Fix the following copy overflow warning identified by Smatch checker. drivers/net/wireless/microchip/wilc1000/wlan_cfg.c:184 wilc_wlan_parse_response_frame() error: '__memcpy()' 'cfg->s[i]->str' copy overflow (512 vs 65537) This patch introduces size check before accessing the memory buffer. The checks are base on the WID type of received data from the firmware. For WID string configuration, the size limit is determined by individual element size in 'struct wilc_cfg_str_vals' that is maintained in 'len' field of 'struct wilc_cfg_str'.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2025-39952 since 04/16/2025. The exploitation is known to be easy. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/18/2026).

The vulnerability scanner Nessus provides a plugin with the ID 302764 (Ubuntu 22.04 LTS / 24.04 LTS : Linux kernel vulnerabilities (USN-8095-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6.108, 6.12.49 or 6.16.9 eliminates this vulnerability. Applying the patch 6085291a1a5865d4ad70f0e5812d524ebd5d1711/2203ef417044b10a8563ade6a17c74183745d72e/ae50f8562306a7ea1cf3c9722f97ee244f974729/fe9e4d0c39311d0f97b024147a0d155333f388b5 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (302764) and CERT Bund (WID-SEC-2025-2194). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Google Cloud Platform
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • Open Source Linux Kernel
  • RESF Rocky Linux
  • IBM QRadar SIEM

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.7

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 302764
Nessus Name: Ubuntu 22.04 LTS / 24.04 LTS : Linux kernel vulnerabilities (USN-8095-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.108/6.12.49/6.16.9
Patch: 6085291a1a5865d4ad70f0e5812d524ebd5d1711/2203ef417044b10a8563ade6a17c74183745d72e/ae50f8562306a7ea1cf3c9722f97ee244f974729/fe9e4d0c39311d0f97b024147a0d155333f388b5

Timelineinfo

04/16/2025 CVE reserved
10/04/2025 +171 days Advisory disclosed
10/04/2025 +0 days VulDB entry created
03/18/2026 +165 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-39952 (🔒)
GCVE (CVE): GCVE-0-2025-39952
GCVE (VulDB): GCVE-100-327041
CERT Bund: WID-SEC-2025-2194 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 10/04/2025 11:34
Updated: 03/18/2026 21:12
Changes: 10/04/2025 11:34 (61), 11/24/2025 02:54 (7), 12/27/2025 02:11 (1), 01/24/2026 11:14 (11), 03/18/2026 21:12 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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